ReactOS 0.4.16-dev-336-gb667d82
extent.cpp
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1
2// Copyright (C) Alexander Telyatnikov, Ivan Keliukh, Yegor Anchishkin, SKIF Software, 1999-2013. Kiev, Ukraine
3// All rights reserved
4// This file was released under the GPLv2 on June 2015.
6/*
7 Module name:
8
9 extent.cpp
10
11 Abstract:
12
13 This file contains filesystem-specific routines
14 responsible for extent & mapping management
15
16*/
17
18#include "udf.h"
19
20#define UDF_BUG_CHECK_ID UDF_FILE_UDF_INFO_EXTENT
21
22/*
23 This routine converts offset in extent to Lba & returns offset in the 1st
24 sector & bytes before end of block.
25 Here we assume no references to AllocDescs
26 */
27uint32
28UDFExtentOffsetToLba(
29 IN PVCB Vcb,
30 IN PEXTENT_MAP Extent, // Extent array
31 IN int64 Offset, // offset in extent
32 OUT uint32* SectorOffset,
33 OUT PSIZE_T AvailLength, // available data in this block
34 OUT uint32* Flags,
35 OUT uint32* Index
36 )
37{
38 uint32 j=0, l, d, BSh = Vcb->BlockSizeBits;
39 uint32 Offs;
40 uint32 i=0, BOffset; // block nums
41
42 BOffset = (uint32)(Offset >> BSh);
43 // scan extent table for suitable range (frag)
44 ExtPrint(("ExtLen %x\n", Extent->extLength));
45 while(i+(d = (l = (Extent->extLength & UDF_EXTENT_LENGTH_MASK)) >> BSh) <= BOffset) {
46
47 if(!l) {
48 if(Index) (*Index) = j-1;
49 if(Flags) {
50 Extent--;
51 (*Flags) = (Extent->extLength >> 30);
52 }
53 return LBA_OUT_OF_EXTENT;
54 }
55 if(!d)
56 break;
57 i += d; //frag offset
58 j++; // frag index
59 Extent++;
60 }
61 BOffset -= i;
62 Offs = (*((uint32*)&Offset)) - (i << BSh); // offset in frag
63
64 if(SectorOffset)
65 (*SectorOffset) = Offs & (Vcb->BlockSize-1);// offset in 1st Lba
66 if(AvailLength)
67 (*AvailLength) = l - Offs;// bytes to EO frag
68 if(Flags)
69 (*Flags) = (Extent->extLength >> 30);
70 if(Index)
71 (*Index) = j;
72
73 ASSERT(((Extent->extLength >> 30) == EXTENT_NOT_RECORDED_NOT_ALLOCATED) || Extent->extLocation);
74
75 return Extent->extLocation + BOffset;// 1st Lba
76} // end UDFExtentOffsetToLba()
77
78uint32
79UDFNextExtentToLba(
80 IN PVCB Vcb,
81 IN PEXTENT_MAP Extent, // Extent array
82 OUT PSIZE_T AvailLength, // available data in this block
83 OUT uint32* Flags,
84 OUT uint32* Index
85 )
86{
87// uint32 Lba;
88
89 uint32 l;
90// uint32 d;
91
92 // scan extent table for suitable range (frag)
93// d = (l = (Extent->extLength & UDF_EXTENT_LENGTH_MASK));
94 l = (Extent->extLength & UDF_EXTENT_LENGTH_MASK);
95
96 if(!l) {
97 (*Index) = -1;
98 Extent--;
99 (*Flags) = (Extent->extLength >> 30);
100 return LBA_OUT_OF_EXTENT;
101 }
102
103 (*Index) = 0;
104 (*AvailLength) = l;// bytes to EO frag
105 (*Flags) = (Extent->extLength >> 30);
106
107 ASSERT(((*Flags) == EXTENT_NOT_RECORDED_NOT_ALLOCATED) || Extent->extLocation);
108
109 return Extent->extLocation;// 1st Lba
110} // end UDFNextExtentToLba()
111
112/*
113 This routine locates frag containing specified Lba in extent
114 */
115ULONG
116UDFLocateLbaInExtent(
117 IN PVCB Vcb,
118 IN PEXTENT_MAP Extent, // Extent array
119 IN lba_t lba
120 )
121{
122 uint32 l, BSh = Vcb->BlockSizeBits;
123 uint32 i=0;
124
125 while((l = ((Extent->extLength & UDF_EXTENT_LENGTH_MASK) >> BSh))) {
126
127 if(Extent->extLocation >= lba &&
128 Extent->extLocation+l < lba) {
129 return i;
130 }
131 i++; //frag offset
132 Extent++;
133 }
134 return LBA_OUT_OF_EXTENT;// index of item in extent, containing out Lba
135} // end UDFLocateLbaInExtent()
136
137/*
138 This routine calculates total length of specified extent.
139 Here we assume no references to AllocDescs
140 */
141int64
142UDFGetExtentLength(
143 IN PEXTENT_MAP Extent // Extent array
144 )
145{
146 if(!Extent) return 0;
147 int64 i=0;
148
149#if defined(_X86_) && defined(_MSC_VER) && !defined(__clang__)
150
151 __asm push ebx
152 __asm push ecx
153 __asm push esi
154
155 __asm lea ebx,i
156 __asm mov esi,Extent
157 __asm xor ecx,ecx
158While_1:
159 __asm mov eax,[esi+ecx*8] // Extent[j].extLength
160 __asm and eax,UDF_EXTENT_LENGTH_MASK
161 __asm jz EO_While
162 __asm add [ebx],eax
163 __asm adc [ebx+4],0
164 __asm inc ecx
165 __asm jmp While_1
166EO_While:;
167 __asm pop esi
168 __asm pop ecx
169 __asm pop ebx
170
171#else // NO X86 optimization , use generic C/C++
172
173 while(Extent->extLength) {
174 i += (Extent->extLength & UDF_EXTENT_LENGTH_MASK);
175 Extent++;
176 }
177
178#endif // _X86_
179
180 return i;
181} // UDFGetExtentLength()
182
183/*
184 This routine appends Zero-terminator to single Extent-entry.
185 Such operation makes it compatible with other internal routines
186 */
187PEXTENT_MAP
188__fastcall
189UDFExtentToMapping_(
190 IN PEXTENT_AD Extent
191#ifdef UDF_TRACK_EXTENT_TO_MAPPING
192 ,IN ULONG src,
193 IN ULONG line
194#endif //UDF_TRACK_EXTENT_TO_MAPPING
195 )
196{
197 PEXTENT_MAP Map;
198
199#ifdef UDF_TRACK_EXTENT_TO_MAPPING
200#define UDF_EXT_MAP_MULT 4
201#else //UDF_TRACK_EXTENT_TO_MAPPING
202#define UDF_EXT_MAP_MULT 2
203#endif //UDF_TRACK_EXTENT_TO_MAPPING
204
205 Map = (PEXTENT_MAP)MyAllocatePoolTag__(NonPagedPool , UDF_EXT_MAP_MULT *
206 sizeof(EXTENT_MAP), MEM_EXTMAP_TAG);
207 if(!Map) return NULL;
208 RtlZeroMemory((int8*)(Map+1), sizeof(EXTENT_MAP));
209 Map[0].extLength = Extent->extLength;
210 Map[0].extLocation = Extent->extLocation;
211#ifdef UDF_TRACK_EXTENT_TO_MAPPING
212 Map[2].extLength = src;
213 Map[2].extLocation = line;
214#endif //UDF_TRACK_EXTENT_TO_MAPPING
215 return Map;
216} // end UDFExtentToMapping()
217
218/*
219 This routine calculates file mapping length (in bytes) including
220 ZERO-terminator
221 */
222uint32
223UDFGetMappingLength(
224 IN PEXTENT_MAP Extent
225 )
226{
227 if(!Extent) return 0;
228 uint32 i=0;
229
230#if defined(_X86_) && defined(_MSC_VER) && !defined(__clang__)
231 __asm push ebx
232
233 __asm mov ebx,Extent
234 __asm xor eax,eax
235While_1:
236 __asm mov ecx,[ebx+eax*8]
237 __asm jecxz EO_While
238 __asm inc eax
239 __asm jmp While_1
240EO_While:
241 __asm inc eax
242 __asm shl eax,3
243 __asm mov i,eax
244
245 __asm pop ebx
246
247#else // NO X86 optimization , use generic C/C++
248
249 while(Extent->extLength) {
250 i++;
251 Extent++;
252 }
253 i++;
254 i*=sizeof(EXTENT_MAP);
255
256#endif // _X86_
257
258 return i; // i*sizeof(EXTENT_MAP)
259} // end UDFGetMappingLength()
260
261/*
262 This routine merges 2 sequencial file mappings
263 */
264PEXTENT_MAP
265__fastcall
266UDFMergeMappings(
267 IN PEXTENT_MAP Extent,
268 IN PEXTENT_MAP Extent2
269 )
270{
271 PEXTENT_MAP NewExt;
272 uint32 len, len2;
273
274 len = UDFGetMappingLength(Extent);
275 len2 = UDFGetMappingLength(Extent2);
276 ASSERT(len2 && len);
277 if(!len2) {
278 return Extent;
279 }
280 if(MyReallocPool__((int8*)Extent, len, (int8**)(&NewExt), len+len2-sizeof(EXTENT_MAP))) {
281 RtlCopyMemory(((int8*)NewExt)+len-sizeof(EXTENT_MAP), (int8*)Extent2, len2);
282 } else {
283 ExtPrint(("UDFMergeMappings failed\n"));
284 BrutePoint();
285 }
286 return NewExt;
287} // end UDFMergeMappings()
288
289/*
290 This routine builds file mapping according to ShortAllocDesc (SHORT_AD)
291 array
292 */
293PEXTENT_MAP
294UDFShortAllocDescToMapping(
295 IN PVCB Vcb,
296 IN uint32 PartNum,
297 IN PSHORT_AD AllocDesc,
298 IN uint32 AllocDescLength,
299 IN uint32 SubCallCount,
300 OUT PEXTENT_INFO AllocLoc
301 )
302{
303 uint32 i, lim, l, len, type;
304// uint32 BSh;
305 PEXTENT_MAP Extent, Extent2, AllocMap;
306 EXTENT_AD AllocExt;
307 PALLOC_EXT_DESC NextAllocDesc;
308 lb_addr locAddr;
309 SIZE_T ReadBytes;
310 EXTENT_INFO NextAllocLoc;
311 BOOLEAN w2k_compat = FALSE;
312
313 ExtPrint(("UDFShortAllocDescToMapping: len=%x\n", AllocDescLength));
314
315 if(SubCallCount > ALLOC_DESC_MAX_RECURSE) return NULL;
316
317 locAddr.partitionReferenceNum = (uint16)PartNum;
318// BSh = Vcb->BlockSizeBits;
319 l = ((lim = (AllocDescLength/sizeof(SHORT_AD))) + 1 ) * sizeof(EXTENT_AD);
320 Extent = (PEXTENT_MAP)MyAllocatePoolTag__(NonPagedPool, l, MEM_EXTMAP_TAG);
321 if(!Extent) return NULL;
322
323 NextAllocLoc.Offset = 0;
324
325 for(i=0;i<lim;i++) {
326 type = AllocDesc[i].extLength >> 30;
327 len = AllocDesc[i].extLength & UDF_EXTENT_LENGTH_MASK;
328 ExtPrint(("ShExt: type %x, loc %x, len %x\n", type, AllocDesc[i].extPosition, len));
329 if(type == EXTENT_NEXT_EXTENT_ALLOCDESC) {
330 // read next frag of allocation descriptors if encountered
331 if(len < sizeof(ALLOC_EXT_DESC)) {
332 MyFreePool__(Extent);
333 return NULL;
334 }
335 NextAllocDesc = (PALLOC_EXT_DESC)MyAllocatePoolTag__(NonPagedPool, len, MEM_ALLOCDESC_TAG);
336 if(!NextAllocDesc) {
337 MyFreePool__(Extent);
338 return NULL;
339 }
340 // record information about this frag
341 locAddr.logicalBlockNum = AllocDesc[i].extPosition;
342 AllocExt.extLength = len;
343 AllocExt.extLocation = UDFPartLbaToPhys(Vcb, &locAddr);
344 if(AllocExt.extLocation == LBA_OUT_OF_EXTENT) {
345 UDFPrint(("bad address\n"));
346 MyFreePool__(NextAllocDesc);
347 MyFreePool__(Extent);
348 return NULL;
349 }
350 NextAllocLoc.Mapping =
351 AllocMap = UDFExtentToMapping(&AllocExt);
352 NextAllocLoc.Length = len;
353 if(!AllocMap) {
354 MyFreePool__(NextAllocDesc);
355 MyFreePool__(Extent);
356 return NULL;
357 }
358 AllocLoc->Mapping = UDFMergeMappings(AllocLoc->Mapping, AllocMap);
359 if(!AllocLoc->Mapping ||
360 // read this frag
361 !OS_SUCCESS(UDFReadExtent(Vcb, &NextAllocLoc,
362 0, len, FALSE, (int8*)NextAllocDesc, &ReadBytes)))
363 {
364 MyFreePool__(AllocMap);
365 MyFreePool__(NextAllocDesc);
366 MyFreePool__(Extent);
367 return NULL;
368 }
369 MyFreePool__(AllocMap);
370 // check integrity
371 if((NextAllocDesc->descTag.tagIdent != TID_ALLOC_EXTENT_DESC) ||
372 (NextAllocDesc->lengthAllocDescs > (len - sizeof(ALLOC_EXT_DESC))) ) {
373 UDFPrint(("Integrity check failed\n"));
374 UDFPrint(("NextAllocDesc->descTag.tagIdent = %x\n", NextAllocDesc->descTag.tagIdent));
375 UDFPrint(("NextAllocDesc->lengthAllocDescs = %x\n", NextAllocDesc->lengthAllocDescs));
376 UDFPrint(("len = %x\n", len));
377 MyFreePool__(NextAllocDesc);
378 MyFreePool__(Extent);
379 return NULL;
380 }
381 // perform recursive call to obtain mapping
382 NextAllocLoc.Flags = 0;
383 Extent2 = UDFShortAllocDescToMapping(Vcb, PartNum, (PSHORT_AD)(NextAllocDesc+1),
384 NextAllocDesc->lengthAllocDescs, SubCallCount+1, AllocLoc);
385 if(!Extent2) {
386 MyFreePool__(NextAllocDesc);
387 MyFreePool__(Extent);
388 return NULL;
389 }
390 UDFCheckSpaceAllocation(Vcb, 0, Extent2, AS_USED); // check if used
391 // and merge this 2 mappings into 1
392 Extent[i].extLength = 0;
393 Extent[i].extLocation = 0;
394 Extent = UDFMergeMappings(Extent, Extent2);
395
396 if(NextAllocLoc.Flags & EXTENT_FLAG_2K_COMPAT) {
397 ExtPrint(("w2k-compat\n"));
398 AllocLoc->Flags |= EXTENT_FLAG_2K_COMPAT;
399 }
400
401 MyFreePool__(Extent2);
402 return Extent;
403 }
404 //
405#ifdef UDF_CHECK_EXTENT_SIZE_ALIGNMENT
406 ASSERT(!(len & (Vcb->LBlockSize-1) ));
407#endif //UDF_CHECK_EXTENT_SIZE_ALIGNMENT
408 if(len & (Vcb->LBlockSize-1)) {
409 w2k_compat = TRUE;
410 }
411 Extent[i].extLength = (len+Vcb->LBlockSize-1) & ~(Vcb->LBlockSize-1);
412 locAddr.logicalBlockNum = AllocDesc[i].extPosition;
413 // Note: for compatibility Adaptec DirectCD we check 'len' here
414 // That strange implementation records bogus extLocation in terminal entries
415 if(type != EXTENT_NOT_RECORDED_NOT_ALLOCATED && len) {
416 Extent[i].extLocation = UDFPartLbaToPhys(Vcb, &locAddr);
417 if(Extent[i].extLocation == LBA_OUT_OF_EXTENT) {
418 UDFPrint(("bad address (2)\n"));
419 MyFreePool__(Extent);
420 return NULL;
421 }
422 } else {
423 Extent[i].extLocation = 0;
424 }
425 if(!len) {
426 // some UDF implementations set strange AllocDesc sequence length,
427 // but terminates it with zeros in proper place, so handle
428 // this case
429 ASSERT(i>=(lim-1));
430 ASSERT(!Extent[i].extLength);
431 Extent[i].extLocation = 0;
432 if( w2k_compat) {
433 ExtPrint(("w2k-compat\n"));
434 AllocLoc->Flags |= EXTENT_FLAG_2K_COMPAT;
435 }
436 return Extent;
437 }
438 Extent[i].extLength |= (type << 30);
439 }
440 // set terminator
441 Extent[i].extLength = 0;
442 Extent[i].extLocation = 0;
443
444 if( w2k_compat) {
445 ExtPrint(("w2k-compat\n"));
446 AllocLoc->Flags |= EXTENT_FLAG_2K_COMPAT;
447 }
448
449 return Extent;
450} // end UDFShortAllocDescToMapping()
451
452/*
453 This routine builds file mapping according to LongAllocDesc (LONG_AD)
454 array
455 */
456PEXTENT_MAP
457UDFLongAllocDescToMapping(
458 IN PVCB Vcb,
459 IN PLONG_AD AllocDesc,
460 IN uint32 AllocDescLength,
461 IN uint32 SubCallCount,
462 OUT PEXTENT_INFO AllocLoc // .Mapping must be intialized (non-Zero)
463 )
464{
465 uint32 i, lim, l, len, type;
466// uint32 BSh;
467 PEXTENT_MAP Extent, Extent2, AllocMap;
468 EXTENT_AD AllocExt;
469 PALLOC_EXT_DESC NextAllocDesc;
470 SIZE_T ReadBytes;
471 EXTENT_INFO NextAllocLoc;
472
473 ExtPrint(("UDFLongAllocDescToMapping: len=%x\n", AllocDescLength));
474
475 if(SubCallCount > ALLOC_DESC_MAX_RECURSE) return NULL;
476
477// BSh = Vcb->BlockSizeBits;
478 l = ((lim = (AllocDescLength/sizeof(LONG_AD))) + 1 ) * sizeof(EXTENT_AD);
479 Extent = (PEXTENT_MAP)MyAllocatePoolTag__(NonPagedPool, l, MEM_EXTMAP_TAG);
480 if(!Extent) return NULL;
481
482 NextAllocLoc.Offset = 0;
483
484 for(i=0;i<lim;i++) {
485 type = AllocDesc[i].extLength >> 30;
486 len = AllocDesc[i].extLength & UDF_EXTENT_LENGTH_MASK;
487 ExtPrint(("LnExt: type %x, loc %x (%x:%x), len %x\n", type, UDFPartLbaToPhys(Vcb,&(AllocDesc[i].extLocation)),
488 AllocDesc[i].extLocation.partitionReferenceNum, AllocDesc[i].extLocation.logicalBlockNum,
489 len));
490 if(type == EXTENT_NEXT_EXTENT_ALLOCDESC) {
491 // read next frag of allocation descriptors if encountered
492 if(len < sizeof(ALLOC_EXT_DESC)) {
493 MyFreePool__(Extent);
494 return NULL;
495 }
496 NextAllocDesc = (PALLOC_EXT_DESC)MyAllocatePoolTag__(NonPagedPool, len, MEM_ALLOCDESC_TAG);
497 if(!NextAllocDesc) {
498 MyFreePool__(Extent);
499 return NULL;
500 }
501 // record information about this frag
502 AllocExt.extLength = len;
503 AllocExt.extLocation = UDFPartLbaToPhys(Vcb,&(AllocDesc[i].extLocation));
504 if(AllocExt.extLocation == LBA_OUT_OF_EXTENT) {
505 UDFPrint(("bad address\n"));
506 MyFreePool__(NextAllocDesc);
507 MyFreePool__(Extent);
508 return NULL;
509 }
510 NextAllocLoc.Mapping =
511 AllocMap = UDFExtentToMapping(&AllocExt);
512 NextAllocLoc.Length = len;
513 if(!AllocMap) {
514 MyFreePool__(NextAllocDesc);
515 MyFreePool__(Extent);
516 return NULL;
517 }
518 AllocLoc->Mapping = UDFMergeMappings(AllocLoc->Mapping, AllocMap);
519 if(!AllocLoc->Mapping ||
520 // read this frag
521 !OS_SUCCESS(UDFReadExtent(Vcb, &NextAllocLoc,
522 0, len, FALSE, (int8*)NextAllocDesc, &ReadBytes)))
523 {
524 MyFreePool__(AllocMap);
525 MyFreePool__(NextAllocDesc);
526 MyFreePool__(Extent);
527 return NULL;
528 }
529 MyFreePool__(AllocMap);
530 // check integrity
531 if((NextAllocDesc->descTag.tagIdent != TID_ALLOC_EXTENT_DESC) ||
532 (NextAllocDesc->lengthAllocDescs > (len - sizeof(ALLOC_EXT_DESC))) ) {
533 UDFPrint(("Integrity check failed\n"));
534 UDFPrint(("NextAllocDesc->descTag.tagIdent = %x\n", NextAllocDesc->descTag.tagIdent));
535 UDFPrint(("NextAllocDesc->lengthAllocDescs = %x\n", NextAllocDesc->lengthAllocDescs));
536 UDFPrint(("len = %x\n", len));
537 MyFreePool__(NextAllocDesc);
538 MyFreePool__(Extent);
539 return NULL;
540 }
541 // perform recursive call to obtain mapping
542 Extent2 = UDFLongAllocDescToMapping(Vcb, (PLONG_AD)(NextAllocDesc+1),
543 NextAllocDesc->lengthAllocDescs, SubCallCount+1, AllocLoc);
544 if(!Extent2) {
545 MyFreePool__(NextAllocDesc);
546 MyFreePool__(Extent);
547 return NULL;
548 }
549 // and merge this 2 mappings into 1
550 Extent[i].extLength = 0;
551 Extent[i].extLocation = 0;
552 Extent = UDFMergeMappings(Extent, Extent2);
553 MyFreePool__(Extent2);
554 return Extent;
555 }
556 //
557 Extent[i].extLength = len;
558#ifdef UDF_CHECK_EXTENT_SIZE_ALIGNMENT
559 ASSERT(!(len & (Vcb->LBlockSize-1) ));
560#endif //UDF_CHECK_EXTENT_SIZE_ALIGNMENT
561 Extent[i].extLength = (len+Vcb->LBlockSize-1) & ~(Vcb->LBlockSize-1);
562 // Note: for compatibility Adaptec DirectCD we check 'len' here
563 // That strange implementation records bogus extLocation in terminal entries
564 if(type != EXTENT_NOT_RECORDED_NOT_ALLOCATED && len) {
565 Extent[i].extLocation = UDFPartLbaToPhys(Vcb,&(AllocDesc[i].extLocation));
566 if(Extent[i].extLocation == LBA_OUT_OF_EXTENT) {
567 UDFPrint(("bad address (2)\n"));
568 MyFreePool__(Extent);
569 return NULL;
570 }
571 } else {
572 Extent[i].extLocation = 0;
573 }
574 if(!len) {
575 // some UDF implementations set strange AllocDesc sequence length,
576 // but terminates it with zeros in proper place, so handle
577 // this case
578 Extent[i].extLocation = 0;
579 return Extent;
580 }
581 Extent[i].extLength |= (type << 30);
582 }
583 // set terminator
584 Extent[i].extLength = 0;
585 Extent[i].extLocation = 0;
586
587 return Extent;
588} // end UDFLongAllocDescToMapping()
589
590/*
591 This routine builds file mapping according to ExtendedAllocDesc (EXT_AD)
592 array
593 */
594PEXTENT_MAP
595UDFExtAllocDescToMapping(
596 IN PVCB Vcb,
597 IN PEXT_AD AllocDesc,
598 IN uint32 AllocDescLength,
599 IN uint32 SubCallCount,
600 OUT PEXTENT_INFO AllocLoc // .Mapping must be intialized (non-Zero)
601 )
602{
603 uint32 i, lim, l, len, type;
604// uint32 BSh;
605 PEXTENT_MAP Extent, Extent2, AllocMap;
606 EXTENT_AD AllocExt;
607 PALLOC_EXT_DESC NextAllocDesc;
608 SIZE_T ReadBytes;
609 EXTENT_INFO NextAllocLoc;
610
611 ExtPrint(("UDFExtAllocDescToMapping: len=%x\n", AllocDescLength));
612
613 if(SubCallCount > ALLOC_DESC_MAX_RECURSE) return NULL;
614
615// BSh = Vcb->BlockSizeBits;
616 l = ((lim = (AllocDescLength/sizeof(EXT_AD))) + 1 ) * sizeof(EXTENT_AD);
617 Extent = (PEXTENT_MAP)MyAllocatePoolTag__(NonPagedPool, l, MEM_EXTMAP_TAG);
618 if(!Extent) return NULL;
619
620 NextAllocLoc.Offset = 0;
621
622 for(i=0;i<lim;i++) {
623 type = AllocDesc[i].extLength >> 30;
624 len = AllocDesc[i].extLength & UDF_EXTENT_LENGTH_MASK;
625 ExtPrint(("ExExt: type %x, loc %x, len %x\n", type, UDFPartLbaToPhys(Vcb,&(AllocDesc[i].extLocation)), len));
626 if(type == EXTENT_NEXT_EXTENT_ALLOCDESC) {
627 // read next frag of allocation descriptors if encountered
628 if(len < sizeof(ALLOC_EXT_DESC)) {
629 MyFreePool__(Extent);
630 return NULL;
631 }
632 NextAllocDesc = (PALLOC_EXT_DESC)MyAllocatePoolTag__(NonPagedPool, len, MEM_ALLOCDESC_TAG);
633 if(!NextAllocDesc) {
634 MyFreePool__(Extent);
635 return NULL;
636 }
637 // record information about this frag
638 AllocExt.extLength = len;
639 AllocExt.extLocation = UDFPartLbaToPhys(Vcb,&(AllocDesc[i].extLocation));
640 if(AllocExt.extLocation == LBA_OUT_OF_EXTENT) {
641 UDFPrint(("bad address\n"));
642 MyFreePool__(NextAllocDesc);
643 MyFreePool__(Extent);
644 return NULL;
645 }
646 NextAllocLoc.Mapping =
647 AllocMap = UDFExtentToMapping(&AllocExt);
648 NextAllocLoc.Length = len;
649 if(!AllocMap) {
650 MyFreePool__(NextAllocDesc);
651 MyFreePool__(Extent);
652 return NULL;
653 }
654 AllocLoc->Mapping = UDFMergeMappings(AllocLoc->Mapping, AllocMap);
655 if(!AllocLoc->Mapping ||
656 // read this frag
657 !OS_SUCCESS(UDFReadExtent(Vcb, &NextAllocLoc,
658 0, len, FALSE, (int8*)NextAllocDesc, &ReadBytes)))
659 {
660 MyFreePool__(AllocMap);
661 MyFreePool__(NextAllocDesc);
662 MyFreePool__(Extent);
663 return NULL;
664 }
665 MyFreePool__(AllocMap);
666 // check integrity
667 if((NextAllocDesc->descTag.tagIdent != TID_ALLOC_EXTENT_DESC) ||
668 (NextAllocDesc->lengthAllocDescs > (len - sizeof(ALLOC_EXT_DESC))) ) {
669 UDFPrint(("Integrity check failed\n"));
670 MyFreePool__(NextAllocDesc);
671 MyFreePool__(Extent);
672 return NULL;
673 }
674 // perform recursive call to obtain mapping
675 Extent2 = UDFExtAllocDescToMapping(Vcb, (PEXT_AD)(NextAllocDesc+1),
676 NextAllocDesc->lengthAllocDescs, SubCallCount+1, AllocLoc);
677 if(!Extent2) {
678 MyFreePool__(NextAllocDesc);
679 MyFreePool__(Extent);
680 return NULL;
681 }
682 // and merge this 2 mappings into 1
683 Extent[i].extLength = 0;
684 Extent[i].extLocation = 0;
685 Extent = UDFMergeMappings(Extent, Extent2);
686 MyFreePool__(Extent2);
687 return Extent;
688 }
689/* if((AllocDesc[i].extLength & UDF_EXTENT_LENGTH_MASK) > // Uncomment!!!
690 (AllocDesc[i].recordedLength & UDF_EXTENT_LENGTH_MASK)) {
691 Extent[i].extLength = AllocDesc[i].recordedLength;
692 Extent[i].extLocation = UDFPartLbaToPhys(Vcb,&(AllocDesc[i].extLocation));
693 }*/
694 Extent[i].extLength = len;
695#ifdef UDF_CHECK_EXTENT_SIZE_ALIGNMENT
696 ASSERT(!(len & (Vcb->LBlockSize-1) ));
697#endif //UDF_CHECK_EXTENT_SIZE_ALIGNMENT
698 // Note: for compatibility Adaptec DirectCD we check 'len' here
699 // That strange implementation records bogus extLocation in terminal entries
700 if(type != EXTENT_NOT_RECORDED_NOT_ALLOCATED && len) {
701 Extent[i].extLocation = UDFPartLbaToPhys(Vcb,&(AllocDesc[i].extLocation));
702 if(Extent[i].extLocation == LBA_OUT_OF_EXTENT) {
703 UDFPrint(("bad address (2)\n"));
704 MyFreePool__(Extent);
705 return NULL;
706 }
707 } else {
708 Extent[i].extLocation = 0;
709 }
710 if(!len) {
711 // some UDF implementations set strange AllocDesc sequence length,
712 // but terminates it with zeros in proper place, so handle
713 // this case
714 Extent[i].extLocation = 0;
715 return Extent;
716 }
717 Extent[i].extLength |= (type << 30);
718 }
719 // set terminator
720 Extent[i].extLength = 0;
721 Extent[i].extLocation = 0;
722
723 return Extent;
724} // end UDFExtAllocDescToMapping()
725
726
727/*
728 This routine builds FileMapping according to given FileEntry
729 Return: pointer to EXTENT_MAP array
730 or offset inside FileEntry (negative)
731 when ICB_FLAG_AD_IN_ICB encountered
732 of NULL if an error occured
733 */
734PEXTENT_MAP
735UDFReadMappingFromXEntry(
736 IN PVCB Vcb,
737 IN uint32 PartNum,
738 IN tag* XEntry,
739 IN OUT uint32* Offset,
740 OUT PEXTENT_INFO AllocLoc // .Mapping must be intialized (non-Zero)
741 )
742{
743 PEXTENT_AD Extent;
744 uint16 AllocMode;
745 int8* AllocDescs;
746 uint32 len;
747// EntityID* eID; // for compatibility with Adaptec DirectCD
748
749 Extent = NULL;
750 (*Offset) = 0;
751
752
753 if(XEntry->tagIdent == TID_FILE_ENTRY) {
754// UDFPrint(("Standard FileEntry\n"));
755 PFILE_ENTRY FileEntry = (PFILE_ENTRY)XEntry;
756 ExtPrint(("Standard FileEntry\n"));
757
758 AllocDescs = (int8*)(((int8*)(FileEntry+1))+(FileEntry->lengthExtendedAttr));
759 len = FileEntry->lengthAllocDescs;
760 AllocLoc->Offset = sizeof(FILE_ENTRY) + FileEntry->lengthExtendedAttr;
761// eID = &(FileEntry->impIdent);
762
763 AllocMode = FileEntry->icbTag.flags & ICB_FLAG_ALLOC_MASK;
764
765 } else if(XEntry->tagIdent == TID_EXTENDED_FILE_ENTRY) {
766// UDFPrint(("Extended FileEntry\n"));
767 ExtPrint(("Extended FileEntry\n"));
768 PEXTENDED_FILE_ENTRY ExFileEntry = (PEXTENDED_FILE_ENTRY)XEntry;
769
770 AllocDescs = (((int8*)(ExFileEntry+1))+(ExFileEntry->lengthExtendedAttr));
771 len = ExFileEntry->lengthAllocDescs;
772 AllocLoc->Offset = sizeof(EXTENDED_FILE_ENTRY) + ExFileEntry->lengthExtendedAttr;
773// eID = &(FileEntry->impIdent);
774
775 AllocMode = ExFileEntry->icbTag.flags & ICB_FLAG_ALLOC_MASK;
776
777 } else {
778 return NULL;
779 }
780
781 // for compatibility with Adaptec DirectCD
782// if(!(Vcb->UDF_VCB_IC_ADAPTEC_NONALLOC_COMPAT))
783
784 AllocLoc->Length=len;
785 AllocLoc->Flags |= EXTENT_FLAG_VERIFY; // for metadata
786
787 switch (AllocMode) {
788 case ICB_FLAG_AD_SHORT: {
789 Extent = UDFShortAllocDescToMapping(Vcb, PartNum, (PSHORT_AD)AllocDescs, len, 0, AllocLoc);
790 break;
791 }
792 case ICB_FLAG_AD_LONG: {
793 Extent = UDFLongAllocDescToMapping(Vcb, (PLONG_AD)AllocDescs, len, 0, AllocLoc);
794 break;
795 }
796 case ICB_FLAG_AD_EXTENDED: {
797 Extent = UDFExtAllocDescToMapping(Vcb, (PEXT_AD)AllocDescs, len, 0, AllocLoc);
798 break;
799 }
800 default : { // case ICB_FLAG_AD_IN_ICB
801 Extent = NULL;
802 *Offset = (uintptr_t)AllocDescs - (uintptr_t)XEntry;
803 AllocLoc->Offset=0;
804 AllocLoc->Length=0;
805 if(AllocLoc->Mapping) MyFreePool__(AllocLoc->Mapping);
806 AllocLoc->Mapping=NULL;
807 break;
808 }
809 }
810
811 ExtPrint(("UDFReadMappingFromXEntry: mode %x, loc %x, len %x\n", AllocMode,
812 AllocLoc->Mapping ? AllocLoc->Mapping[0].extLocation : -1, len));
813
814 UDFCheckSpaceAllocation(Vcb, 0, Extent, AS_USED); // check if used
815
816 return Extent;
817}// end UDFReadMappingFromXEntry()
818
819#ifndef UDF_READ_ONLY_BUILD
820/*
821 This routine builds data for AllocDesc sequence for specified
822 extent
823 */
824OSSTATUS
825UDFBuildShortAllocDescs(
826 IN PVCB Vcb,
827 IN uint32 PartNum,
828 OUT int8** Buff, // data for AllocLoc
829 IN uint32 InitSz,
830 IN OUT PUDF_FILE_INFO FileInfo
831 )
832{
833 uint32 i, j;
834 uint32 len=0;
835 PEXTENT_MAP Extent = FileInfo->Dloc->DataLoc.Mapping;
836 PEXTENT_INFO AllocExtent = &(FileInfo->Dloc->AllocLoc);
837 PSHORT_AD Alloc;
838 uint32 NewLen;
839 OSSTATUS status;
840 uint32 ph_len=0; // in general, this should be uint64,
841 // but we need its lower part only
842#ifdef UDF_ALLOW_FRAG_AD
843 uint32 ts, ac, len2;
844 uint32 LBS = Vcb->LBlockSize;
845 uint32 LBSh = Vcb->BlockSizeBits;
846 uint32 TagLen = 0;
847 tag* Tag = NULL;
848 PSHORT_AD saved_Alloc;
849 uint32 TagLoc, prevTagLoc;
850 uint32 BufOffs;
851 uint32 ExtOffs;
852 uint32 saved_NewLen;
853#endif //UDF_ALLOW_FRAG_AD
854
855 ValidateFileInfo(FileInfo);
856 ExtPrint(("UDFBuildShortAllocDescs: FE %x\n", FileInfo->Dloc->FELoc.Mapping[0].extLocation));
857 // calculate length
858 for(len=0; (i=(Extent[len].extLength & UDF_EXTENT_LENGTH_MASK)); len++, ph_len+=i) {
859 ExtPrint(("bShExt: type %x, loc %x, len %x\n",
860 Extent[len].extLength >> 30, Extent[len].extLocation, Extent[len].extLength & UDF_EXTENT_LENGTH_MASK));
861 }
862 Alloc = (PSHORT_AD)MyAllocatePoolTag__(NonPagedPool, (len+1)*sizeof(SHORT_AD), MEM_SHAD_TAG);
863 if(!Alloc) {
864 BrutePoint();
865 return STATUS_INSUFFICIENT_RESOURCES;
866 }
867 // fill contiguous AllocDesc buffer (decribing UserData)
868 for(i=0;i<len;i++) {
869 Alloc[i].extLength = Extent[i].extLength;
870 Alloc[i].extPosition = UDFPhysLbaToPart(Vcb, PartNum, Extent[i].extLocation);
871 }
872 if((Vcb->CompatFlags & UDF_VCB_IC_W2K_COMPAT_ALLOC_DESCS) && i) {
873 Alloc[i-1].extLength -= (ph_len - (ULONG)(FileInfo->Dloc->DataLoc.Length)) &
874 (Vcb->LBlockSize-1);
875 ExtPrint(("bShExt: cut tail -> %x\n",
876 Alloc[i-1].extLength & UDF_EXTENT_LENGTH_MASK));
877 }
878 Alloc[i].extLength =
879 Alloc[i].extPosition = 0;
880 j = len*sizeof(SHORT_AD); // required space
881 len = (InitSz & ~(sizeof(SHORT_AD)-1)); // space available in 1st block
882 ASSERT(len == InitSz);
883
884 // Ok. Let's init AllocLoc
885 if(!(FileInfo->Dloc->AllocLoc.Mapping)) {
886 FileInfo->Dloc->AllocLoc.Mapping = (PEXTENT_MAP)MyAllocatePoolTag__(NonPagedPool, 2 * sizeof(EXTENT_MAP), MEM_EXTMAP_TAG);
887 if(!(FileInfo->Dloc->AllocLoc.Mapping)) {
888 BrutePoint();
889 MyFreePool__(Alloc);
890 return STATUS_INSUFFICIENT_RESOURCES;
891 }
892 // allocation descriptors are located in the same sector as FileEntry
893 // (at least their 1st part), just after it
894 FileInfo->Dloc->AllocLoc.Mapping[0] = FileInfo->Dloc->FELoc.Mapping[0];
895 FileInfo->Dloc->AllocLoc.Offset = FileInfo->Dloc->FileEntryLen;
896 FileInfo->Dloc->AllocLoc.Length = 0;
897 // set terminator
898 FileInfo->Dloc->AllocLoc.Mapping[1].extLength =
899 FileInfo->Dloc->AllocLoc.Mapping[1].extLocation = 0;
900 }
901
902 if(j <= len) {
903 // we needn't allocating additional blocks to store AllocDescs
904 AdPrint(("in-ICB AllocDescs, j=%x\n",j));
905 RtlCopyMemory(*Buff, (int8*)Alloc, j);
906 NewLen = j;
907 MyFreePool__(Alloc);
908 } else {
909#ifndef UDF_ALLOW_FRAG_AD
910 AdPrint((" DISK_FULL\n"));
911 return STATUS_DISK_FULL;
912#else //UDF_ALLOW_FRAG_AD
913 AdPrint(("multi-block AllocDescs, j=%x\n",j));
914 BufOffs = 0;
915 TagLoc = prevTagLoc = 0;
916 // calculate the space available for SHORT_ADs in each block
917 ac = (LBS - (sizeof(ALLOC_EXT_DESC) + sizeof(SHORT_AD))) & ~(sizeof(SHORT_AD)-1);
918 len2 = len;
919 // tail size
920 ts = InitSz - len2;
921 len -= sizeof(SHORT_AD);
922 // calculate actual AllocSequence length (in bytes)
923 NewLen = ( ((j - len + ac - 1) / ac) << LBSh) + InitSz + sizeof(SHORT_AD);
924 MyFreePool__(*Buff);
925 (*Buff) = (int8*)MyAllocatePoolTag__(NonPagedPool, NewLen, MEM_SHAD_TAG);
926 if(!(*Buff)) {
927 status = STATUS_INSUFFICIENT_RESOURCES;
928 UDFPrint(("UDFResizeExtent() failed (%x)\n",status));
929 BrutePoint();
930 goto sh_alloc_err;
931 }
932 if(UDFGetExtentLength(AllocExtent->Mapping) < NewLen) {
933 status = UDFResizeExtent(Vcb, PartNum, NewLen, TRUE, AllocExtent);
934 if(!OS_SUCCESS(status)) {
935 UDFPrint(("UDFResizeExtent(2) failed (%x)\n",status));
936 BrutePoint();
937sh_alloc_err:
938 MyFreePool__(Alloc);
939 return status;
940 }
941 }
942 ExtOffs = AllocExtent->Offset;
943 RtlZeroMemory(*Buff, NewLen);
944 saved_NewLen = NewLen;
945 NewLen = 0; // recorded length
946 saved_Alloc = Alloc;
947 // fill buffer sector by sector (adding links at the end of each one)
948 while(TRUE) {
949
950 // j - remained AllocDescs length (in bytes)
951 // len - bytes available for AllocDescs in current block
952 // ac - bytes available for AllocDescs in each block
953
954 // leave space for terminator or pointer to next part of sequence
955 if(j == len2) {
956 // if we have only 1 SHORT_AD that we can fit in last sector
957 // we shall do it instead of recording link & allocating new block
958 len =
959 TagLen = len2;
960 }
961 ASSERT(saved_NewLen >= (BufOffs + len));
962 RtlCopyMemory( (*Buff)+BufOffs, (int8*)Alloc, len);
963 Alloc = (PSHORT_AD)((int8*)Alloc + len);
964 j -= len;
965 BufOffs += len;
966 if(Tag) {
967 // Set up Tag for AllocDesc
968 Tag->tagIdent = TID_ALLOC_EXTENT_DESC;
969 UDFSetUpTag(Vcb, Tag, (uint16)TagLen, TagLoc);
970 prevTagLoc = TagLoc;
971 }
972 if(!j) {
973 // terminate loop
974 NewLen = BufOffs;
975 break;
976 }
977 len = ac;
978 if(j <= (len + sizeof(SHORT_AD)))
979 len = j - sizeof(SHORT_AD);
980 len2 = len + sizeof(SHORT_AD);
981 // we have more than 1 SHORT_AD that we can't fit in current block
982 // so we shall set up pointer to the next block
983 ((PSHORT_AD)((*Buff)+BufOffs))->extLength = /*LBS*/ len2 |
984 (((uint32)EXTENT_NEXT_EXTENT_ALLOCDESC) << 30) ;
985 ((PSHORT_AD)((*Buff)+BufOffs))->extPosition = TagLoc =
986 UDFPhysLbaToPart(Vcb, PartNum,
987 UDFExtentOffsetToLba(Vcb, AllocExtent->Mapping,
988 ExtOffs+BufOffs+sizeof(SHORT_AD)+ts,
989 NULL, NULL, NULL, NULL) );
990 // reflect additional (link) block & LBlock tail (if any)
991 BufOffs += ts+sizeof(SHORT_AD);
992 // init AllocDesc
993 ( (PALLOC_EXT_DESC) ((*Buff)+BufOffs))->lengthAllocDescs = len2;
994 ( (PALLOC_EXT_DESC) ((*Buff)+BufOffs))->previousAllocExtLocation = prevTagLoc;
995 Tag = (tag*)((*Buff)+BufOffs);
996 TagLen = len2;
997 ts = LBS-len2-sizeof(ALLOC_EXT_DESC);
998 BufOffs += sizeof(ALLOC_EXT_DESC);
999 }
1000 MyFreePool__(saved_Alloc);
1001#endif //UDF_ALLOW_FRAG_AD
1002 }
1003 status = UDFResizeExtent(Vcb, PartNum, NewLen, TRUE, AllocExtent);
1004 return status;
1005} // end UDFBuildShortAllocDescs()
1006
1007/*
1008 This routine builds data for AllocDesc sequence for specified
1009 extent
1010 */
1011OSSTATUS
1012UDFBuildLongAllocDescs(
1013 IN PVCB Vcb,
1014 IN uint32 PartNum,
1015 OUT int8** Buff, // data for AllocLoc
1016 IN uint32 InitSz,
1017 IN OUT PUDF_FILE_INFO FileInfo
1018 )
1019{
1020 uint32 i, j;
1021 uint32 len=0;
1022 PEXTENT_MAP Extent = FileInfo->Dloc->DataLoc.Mapping;
1023 PEXTENT_INFO AllocExtent = &(FileInfo->Dloc->AllocLoc);
1024 PLONG_AD Alloc;
1025 uint32 NewLen;
1026 OSSTATUS status;
1027 uint32 ph_len=0; // in general, this should be uint64,
1028 // but we need its lower part only
1029#ifdef UDF_ALLOW_FRAG_AD
1030 uint32 ac, len2, ts;
1031 uint32 TagLoc, prevTagLoc;
1032 uint32 LBS = Vcb->LBlockSize;
1033 uint32 LBSh = Vcb->BlockSizeBits;
1034 uint32 BufOffs;
1035 uint32 ExtOffs = AllocExtent->Offset;
1036 PLONG_AD saved_Alloc;
1037 uint32 TagLen = 0;
1038 tag* Tag = NULL;
1039#endif //UDF_ALLOW_FRAG_AD
1040
1041 ValidateFileInfo(FileInfo);
1042 ExtPrint(("UDFBuildLongAllocDescs: FE %x\n", FileInfo->Dloc->FELoc.Mapping[0].extLocation));
1043 // calculate length
1044 //for(len=0; i=(Extent[len].extLength & UDF_EXTENT_LENGTH_MASK); len++, ph_len+=i);
1045 for(len=0; (i=(Extent[len].extLength & UDF_EXTENT_LENGTH_MASK)); len++, ph_len+=i) {
1046 ExtPrint(("bLnExt: type %x, loc %x, len %x\n",
1047 Extent[len].extLength >> 30, Extent[len].extLocation, Extent[len].extLength & UDF_EXTENT_LENGTH_MASK));
1048 }
1049 Alloc = (PLONG_AD)MyAllocatePoolTag__(NonPagedPool, (len+1)*sizeof(LONG_AD), MEM_LNGAD_TAG);
1050 if(!Alloc) return STATUS_INSUFFICIENT_RESOURCES;
1051 // fill contiguous AllocDesc buffer (decribing UserData)
1052 for(i=0;i<len;i++) {
1053 Alloc[i].extLength = Extent[i].extLength;
1054 Alloc[i].extLocation.logicalBlockNum = UDFPhysLbaToPart(Vcb, PartNum, Extent[i].extLocation);
1055 Alloc[i].extLocation.partitionReferenceNum = (uint16)PartNum;
1056 RtlZeroMemory(&(Alloc[i].impUse), sizeof(Alloc[i].impUse));
1057 }
1058 if((Vcb->CompatFlags & UDF_VCB_IC_W2K_COMPAT_ALLOC_DESCS) && i) {
1059 Alloc[i-1].extLength -= (ph_len - (ULONG)(FileInfo->Dloc->DataLoc.Length)) &
1060 (Vcb->LBlockSize-1);
1061 ExtPrint(("bLnExt: cut tail -> %x\n",
1062 Alloc[i-1].extLength & UDF_EXTENT_LENGTH_MASK));
1063 }
1064 RtlZeroMemory(&(Alloc[i]), sizeof(LONG_AD));
1065 j = len*sizeof(LONG_AD); // required space
1066 len = (InitSz & ~(sizeof(LONG_AD)-1)); // space available in 1st block
1067 ASSERT(len == InitSz);
1068
1069 // Ok. Let's init AllocLoc
1070 if(!(FileInfo->Dloc->AllocLoc.Mapping)) {
1071 FileInfo->Dloc->AllocLoc.Mapping = (PEXTENT_MAP)MyAllocatePoolTag__(NonPagedPool, 2 * sizeof(EXTENT_MAP), MEM_EXTMAP_TAG);
1072 if(!(FileInfo->Dloc->AllocLoc.Mapping)) {
1073 MyFreePool__(Alloc);
1074 return STATUS_INSUFFICIENT_RESOURCES;
1075 }
1076 // allocation descriptors are located in the same sector as FileEntry
1077 // (at least their 1st part), just after it
1078 FileInfo->Dloc->AllocLoc.Mapping[0] = FileInfo->Dloc->FELoc.Mapping[0];
1079 FileInfo->Dloc->AllocLoc.Offset = FileInfo->Dloc->FileEntryLen;
1080 FileInfo->Dloc->AllocLoc.Length = 0;
1081 // set terminator
1082 FileInfo->Dloc->AllocLoc.Mapping[1].extLength =
1083 FileInfo->Dloc->AllocLoc.Mapping[1].extLocation = 0;
1084 }
1085
1086 if(j <= len) {
1087 // we needn't allocating additional blocks to store AllocDescs
1088 RtlCopyMemory(*Buff, (int8*)Alloc, j);
1089 NewLen = j;
1090 MyFreePool__(Alloc);
1091 } else {
1092#ifndef UDF_ALLOW_FRAG_AD
1093 AdPrint((" DISK_FULL\n"));
1094 return STATUS_DISK_FULL;
1095#else //UDF_ALLOW_FRAG_AD
1096 BufOffs = 0;
1097 TagLoc = prevTagLoc = 0;
1098 // calculate the space available for LONG_ADs in each block
1099 ac = (LBS - (sizeof(ALLOC_EXT_DESC) + sizeof(LONG_AD))) & ~(sizeof(LONG_AD)-1);
1100 len2 = len;
1101 // tail size
1102 ts = InitSz - len2;
1103 len -= sizeof(LONG_AD);
1104 // calculate actual AllocSequence length (in LBlocks)
1105 NewLen = ( ((j - len + ac - 1) / ac) << LBSh) + InitSz + sizeof(LONG_AD);
1106 MyFreePool__(*Buff);
1107 (*Buff) = (int8*)MyAllocatePoolTag__(NonPagedPool, NewLen, MEM_LNGAD_TAG);
1108 if(!(*Buff)) {
1109 status = STATUS_INSUFFICIENT_RESOURCES;
1110 goto lad_alloc_err;
1111 }
1112 if(UDFGetExtentLength(AllocExtent->Mapping) < NewLen) {
1113 status = UDFResizeExtent(Vcb, PartNum, NewLen, TRUE, AllocExtent);
1114 if(!OS_SUCCESS(status)) {
1115lad_alloc_err:
1116 MyFreePool__(Alloc);
1117 return status;
1118 }
1119 }
1120 ExtOffs = AllocExtent->Offset;
1121 RtlZeroMemory(*Buff, NewLen);
1122 NewLen = 0; // recorded length
1123 saved_Alloc = Alloc;
1124 len2 = len+sizeof(LONG_AD);
1125 // fill buffer sector by sector (adding links at the end of each one)
1126 while(TRUE) {
1127
1128 // j - remained AllocDescs length (in bytes)
1129 // len - bytes available for in AllocDescs each block
1130
1131 // leave space for terminator or pointer to next part of sequence
1132 if(j == len2) {
1133 // if we have only 1 LONG_AD that we can fit in last sector
1134 // we shall do it instead of recording link & allocating new block
1135 len =
1136 TagLen = len2;
1137 }
1138 RtlCopyMemory( (*Buff)+BufOffs, (int8*)Alloc, len);
1139 Alloc = (PLONG_AD)((int8*)Alloc + len);
1140 j -= len;
1141 BufOffs += len;
1142 if(Tag) {
1143 // Set up Tag for AllocDesc
1144 Tag->tagIdent = TID_ALLOC_EXTENT_DESC;
1145 UDFSetUpTag(Vcb, Tag, (uint16)TagLen, TagLoc);
1146 prevTagLoc = TagLoc;
1147 }
1148 if(!j) {
1149 // terminate loop
1150 NewLen = BufOffs;
1151 break;
1152 }
1153 len = ac;
1154 if(j <= (len + sizeof(LONG_AD)))
1155 len = j - sizeof(LONG_AD);
1156 len2 = len+sizeof(LONG_AD);
1157 // we have more than 1 LONG_AD that we can't fit in current block
1158 // so we shall set up pointer to the next block
1159 ((PLONG_AD)((*Buff)+BufOffs))->extLength = /*LBS*/ len2 |
1160 (((uint32)EXTENT_NEXT_EXTENT_ALLOCDESC) << 30) ;
1161 ((PLONG_AD)((*Buff)+BufOffs))->extLocation.logicalBlockNum = TagLoc =
1162 UDFPhysLbaToPart(Vcb, PartNum,
1163 UDFExtentOffsetToLba(Vcb, AllocExtent->Mapping,
1164 ExtOffs+BufOffs+sizeof(LONG_AD)+ts,
1165 NULL, NULL, NULL, NULL) );
1166 ((PLONG_AD)((*Buff)+BufOffs))->extLocation.partitionReferenceNum = (uint16)PartNum;
1167 // reflect additional (link) block & LBlock tail (if any)
1168 BufOffs += ts+sizeof(LONG_AD);
1169 // init AllocDesc
1170 ( (PALLOC_EXT_DESC) ((*Buff)+BufOffs))->lengthAllocDescs = len2;
1171 ( (PALLOC_EXT_DESC) ((*Buff)+BufOffs))->previousAllocExtLocation = prevTagLoc;
1172 Tag = (tag*)((*Buff)+BufOffs);
1173 TagLen = len2;
1174 ts = LBS-len2-sizeof(ALLOC_EXT_DESC);
1175 BufOffs += sizeof(ALLOC_EXT_DESC);
1176 }
1177 MyFreePool__(saved_Alloc);
1178#endif //UDF_ALLOW_FRAG_AD
1179 }
1180 status = UDFResizeExtent(Vcb, PartNum, NewLen, TRUE, AllocExtent);
1181 return status;
1182} // end UDFBuildLongAllocDescs()
1183
1184/*
1185 This routine builds data for AllocDesc sequence for specified
1186 extent
1187 */
1188/*OSSTATUS
1189UDFBuildExtAllocDescs(
1190 IN PVCB Vcb,
1191 IN uint32 PartNum,
1192 OUT int8** Buff, // data for AllocLoc
1193 IN uint32 InitSz,
1194 IN OUT PUDF_FILE_INFO FileInfo
1195 )
1196{
1197 uint32 i, j;
1198 uint32 len=0, ac, len2;
1199 uint32 TagLoc, prevTagLoc;
1200 uint32 LBS = Vcb->LBlockSize;
1201 uint32 LBSh = Vcb->BlockSizeBits;
1202 PEXTENT_MAP Extent = FileInfo->Dloc->DataLoc.Mapping;
1203 PEXTENT_INFO AllocExtent = &(FileInfo->Dloc->AllocLoc);
1204 PEXT_AD Alloc, saved_Alloc;
1205 uint32 BufOffs;
1206 uint32 ExtOffs = AllocExtent->Offset;
1207 uint32 NewLen;
1208 OSSTATUS status;
1209 uint32 TagLen = 0;
1210 tag* Tag = NULL;
1211
1212 ValidateFileInfo(FileInfo);
1213 // calculate length
1214 for(len=0; Extent[len].extLength; len++);
1215 Alloc = (PEXT_AD)MyAllocatePool__(NonPagedPool, (len+1)*sizeof(EXT_AD));
1216 if(!Alloc) return STATUS_INSUFFICIENT_RESOURCES;
1217 // fill contiguous AllocDesc buffer (decribing UserData)
1218 for(i=0;i<len;i++) {
1219 Alloc[i].extLength =
1220 Alloc[i].recordedLength =
1221 Alloc[i].informationLength = Extent[i].extLength;
1222 Alloc[i].extLocation.logicalBlockNum = UDFPhysLbaToPart(Vcb, PartNum, Extent[i].extLocation);
1223 Alloc[i].extLocation.partitionReferenceNum = (uint16)PartNum;
1224 }
1225 RtlZeroMemory(&(Alloc[i]), sizeof(EXT_AD));
1226 j = len*sizeof(EXT_AD); // required space
1227 len = InitSz; // space available in 1st block
1228
1229 // Ok. Let's init AllocLoc
1230 if(!(FileInfo->Dloc->AllocLoc.Mapping)) {
1231 FileInfo->Dloc->AllocLoc.Mapping = (PEXTENT_MAP)MyAllocatePool__(NonPagedPool, 2 * sizeof(EXTENT_MAP));
1232 if(!(FileInfo->Dloc->AllocLoc.Mapping)) {
1233 MyFreePool__(Alloc);
1234 return STATUS_INSUFFICIENT_RESOURCES;
1235 }
1236 // allocation descriptors are located in the same sector as FileEntry
1237 // (at least their 1st part), just after it
1238 FileInfo->Dloc->AllocLoc.Mapping[0] = FileInfo->Dloc->FELoc.Mapping[0];
1239 FileInfo->Dloc->AllocLoc.Offset = FileInfo->Dloc->FileEntryLen;
1240 FileInfo->Dloc->AllocLoc.Length = 0;
1241 // set terminator
1242 FileInfo->Dloc->AllocLoc.Mapping[1].extLength =
1243 FileInfo->Dloc->AllocLoc.Mapping[1].extLocation = 0;
1244 }
1245
1246 if(j <= len) {
1247 // we needn't allocating additional blocks to store AllocDescs
1248 RtlCopyMemory(*Buff, (int8*)Alloc, j);
1249 NewLen = j;
1250 MyFreePool__(Alloc);
1251 } else {
1252 BufOffs = 0;
1253 TagLoc = prevTagLoc = 0;
1254 // calculate the space available for EXT_ADs in each block
1255 ac = (LBS - (sizeof(ALLOC_EXT_DESC) + sizeof(EXT_AD))) & ~(sizeof(EXT_AD)-1);
1256 // calculate actual AllocSequence length (in LBlocks)
1257 len -= sizeof(EXT_AD);
1258 NewLen = ( ((j - len + ac - 1) / ac) << LBSh) + len + sizeof(EXT_AD);
1259 MyFreePool__(*Buff);
1260 (*Buff) = (int8*)MyAllocatePool__(NonPagedPool, NewLen);
1261 if(UDFGetExtentLength(AllocExtent->Mapping) < NewLen) {
1262 status = UDFResizeExtent(Vcb, PartNum, NewLen, TRUE, AllocExtent);
1263 if(!OS_SUCCESS(status)) {
1264 MyFreePool__(Alloc);
1265 return status;
1266 }
1267 }
1268 RtlZeroMemory(*Buff, NewLen);
1269 NewLen = 0; // recorded length
1270 saved_Alloc = Alloc;
1271 len2 = len + sizeof(EXT_AD);
1272 // fill buffer sector by sector (adding links at the end of each one)
1273 while(TRUE) {
1274
1275 // j - remained AllocDescs length (in bytes)
1276 // len - bytes available for in AllocDescs each block
1277
1278 // leave space for terminator or pointer to next part of sequence
1279 if(j == len2) {
1280 // if we have only 1 EXT_AD that we can fit in last sector
1281 // we shall do it instead of recording link & allocating new block
1282 len =
1283 TagLen = len2;
1284 }
1285 RtlCopyMemory( (*Buff)+BufOffs, (int8*)Alloc, len);
1286 Alloc = (PEXT_AD)((int8*)Alloc + len);
1287 j -= len;
1288 BufOffs += len;
1289 if(Tag) {
1290 // Set up Tag for AllocDesc
1291 Tag->tagIdent = TID_ALLOC_EXTENT_DESC;
1292 UDFSetUpTag(Vcb, Tag, (uint16)TagLen, TagLoc);
1293 prevTagLoc = TagLoc;
1294 }
1295 if(!j) {
1296 // terminate loop
1297 NewLen = BufOffs;
1298 break;
1299 }
1300 len = ac;
1301 if(j <= (len + sizeof(EXT_AD)))
1302 len = j - sizeof(EXT_AD);
1303 len2 = len + sizeof(EXT_AD);
1304 // we have more than 1 EXT_AD that we can't fit in current block
1305 // so we shall set up pointer to the next block
1306 ((PEXT_AD)((*Buff)+BufOffs))->extLength =
1307 ((PEXT_AD)((*Buff)+BufOffs))->recordedLength = LBS;
1308 ((PEXT_AD)((*Buff)+BufOffs))->informationLength = len2 |
1309 (((uint32)EXTENT_NEXT_EXTENT_ALLOCDESC) << 30) ;
1310 ((PEXT_AD)((*Buff)+BufOffs))->extLocation.logicalBlockNum = TagLoc =
1311 UDFPhysLbaToPart(Vcb, PartNum,
1312 UDFExtentOffsetToLba(Vcb, AllocExtent->Mapping, ExtOffs + BufOffs + 2*sizeof(EXT_AD)-1, NULL, NULL, NULL, NULL) );
1313 ((PEXT_AD)((*Buff)+BufOffs))->extLocation.partitionReferenceNum = (uint16)PartNum;
1314 BufOffs = (BufOffs + 2*sizeof(EXT_AD) - 1) & ~(sizeof(EXT_AD)-1) ;
1315 // init AllocDesc
1316 ( (PALLOC_EXT_DESC) ((*Buff)+BufOffs))->lengthAllocDescs = len2;
1317 ( (PALLOC_EXT_DESC) ((*Buff)+BufOffs))->previousAllocExtLocation = prevTagLoc;
1318 Tag = (tag*)((*Buff)+BufOffs);
1319 TagLen = len2;
1320 BufOffs += sizeof(ALLOC_EXT_DESC);
1321 }
1322 MyFreePool__(saved_Alloc);
1323 }
1324 status = UDFResizeExtent(Vcb, PartNum, NewLen, TRUE, AllocExtent);
1325 return status;
1326} // end UDFBuildExtAllocDescs()*/
1327
1328void
1329UDFDiscardFESpace(
1330 IN PVCB Vcb,
1331 IN PEXTENT_MAP Mapping,
1332 IN uint32 lim
1333 )
1334{
1335#ifdef UDF_FE_ALLOCATION_CHARGE // UDF_FE_ALLOCATION_CHARGE
1336 PEXTENT_MAP Mapping2;
1337 uint32 i;
1338
1339 UDFPrint((" DiscardFESpace\n"));
1340 Mapping2 = Mapping;
1341 for(i=0;i<lim;i++, Mapping++) {
1342 // we should not discard allocated FEs
1343 if( (Mapping->extLength >> 30) == EXTENT_RECORDED_ALLOCATED) {
1344 UDFPrint((" used @ %x\n", Mapping->extLocation));
1345 Mapping->extLength = Vcb->LBlockSize | (EXTENT_NOT_RECORDED_NOT_ALLOCATED << 30);
1346 Mapping->extLocation = 0;
1347 } else {
1348 UDFPrint((" free @ %x\n", Mapping->extLocation));
1349 }
1350 }
1351 UDFMarkSpaceAsXXX(Vcb, 0, Mapping2, AS_DISCARDED);
1352
1353 MyFreePool__(Mapping2);
1354#else // UDF_FE_ALLOCATION_CHARGE
1355 ASSERT(!Dloc->DirIndex->FECharge.Mapping);
1356 return;
1357#endif // UDF_FE_ALLOCATION_CHARGE
1358} // end UDFDiscardFESpace()
1359
1360OSSTATUS
1361UDFInitAllocationCache(
1362 IN PVCB Vcb,
1363 IN uint32 AllocClass,
1364 OUT PUDF_ALLOCATION_CACHE_ITEM* _AllocCache,
1365 OUT uint32* _lim,
1366 IN BOOLEAN Init
1367 )
1368{
1369 PUDF_ALLOCATION_CACHE_ITEM AllocCache;
1370 PUDF_ALLOCATION_CACHE_ITEM* pAllocCache;
1371 uint32 i, lim;
1372 uint32* plim;
1373
1374 switch(AllocClass) {
1375 case UDF_PREALLOC_CLASS_FE:
1376 UDFPrint(("AllocationCache FE:\n"));
1377 pAllocCache = &(Vcb->FEChargeCache);
1378 plim = &(Vcb->FEChargeCacheMaxSize);
1379 lim = 32;
1380 break;
1381 case UDF_PREALLOC_CLASS_DIR:
1382 UDFPrint(("AllocationCache DIR:\n"));
1383 pAllocCache = &(Vcb->PreallocCache);
1384 plim = &(Vcb->PreallocCacheMaxSize);
1385 lim = 32;
1386 break;
1387 default:
1388 return STATUS_INVALID_PARAMETER;
1389 }
1390 if(!(*plim)) {
1391 if(!Init) {
1392 return STATUS_UNSUCCESSFUL;
1393 }
1394 (*pAllocCache) = AllocCache =
1395 (PUDF_ALLOCATION_CACHE_ITEM)
1396 MyAllocatePoolTag__(NonPagedPool , sizeof(UDF_ALLOCATION_CACHE_ITEM)*lim,
1397 MEM_ALLOC_CACHE_TAG);
1398 if(!AllocCache) {
1399 return STATUS_INSUFFICIENT_RESOURCES;
1400 }
1401 RtlZeroMemory(AllocCache, sizeof(UDF_ALLOCATION_CACHE_ITEM)*lim);
1402 for(i=0; i<lim; i++) {
1403 AllocCache[i].ParentLocation = LBA_NOT_ALLOCATED;
1404 }
1405 (*plim) = lim;
1406 } else {
1407 lim = (*plim);
1408 AllocCache = (*pAllocCache);
1409 }
1410 (*_lim) = lim;
1411 (*_AllocCache) = AllocCache;
1412
1413 return STATUS_SUCCESS;
1414} // end UDFInitAllocationCache()
1415
1416OSSTATUS
1417UDFGetCachedAllocation(
1418 IN PVCB Vcb,
1419 IN uint32 ParentLocation,
1420 OUT PEXTENT_INFO Ext,
1421 OUT uint32* Items, // optional
1422 IN uint32 AllocClass
1423 )
1424{
1425 PUDF_ALLOCATION_CACHE_ITEM AllocCache;
1426 uint32 i, lim;
1427 OSSTATUS status;
1428
1429 UDFAcquireResourceExclusive(&(Vcb->PreallocResource),TRUE);
1430
1431 status = UDFInitAllocationCache(Vcb, AllocClass, &AllocCache, &lim, FALSE);
1432 if(!OS_SUCCESS(status)) {
1433 UDFReleaseResource(&(Vcb->PreallocResource));
1434 return status;
1435 }
1436 UDFPrint(("Get AllocationCache for %x\n", ParentLocation));
1437
1438 for(i=0; i<lim; i++) {
1439 if(AllocCache[i].ParentLocation == ParentLocation) {
1440 (*Ext) = AllocCache[i].Ext;
1441 AdPrint((" map %x (%x)\n", Ext->Mapping, i));
1442 if(Items) {
1443 (*Items) = AllocCache[i].Items;
1444 }
1445 RtlZeroMemory(&(AllocCache[i]), sizeof(AllocCache[i]));
1446 AllocCache[i].ParentLocation = LBA_NOT_ALLOCATED;
1447 UDFReleaseResource(&(Vcb->PreallocResource));
1448 return STATUS_SUCCESS;
1449 }
1450 }
1451 AdPrint((" no map\n"));
1452 UDFReleaseResource(&(Vcb->PreallocResource));
1453 return STATUS_UNSUCCESSFUL;
1454} // end UDFGetCachedAllocation()
1455
1456OSSTATUS
1457UDFStoreCachedAllocation(
1458 IN PVCB Vcb,
1459 IN uint32 ParentLocation,
1460 IN PEXTENT_INFO Ext,
1461 IN uint32 Items,
1462 IN uint32 AllocClass
1463 )
1464{
1465 PUDF_ALLOCATION_CACHE_ITEM AllocCache;
1466 uint32 i, lim;
1467 OSSTATUS status;
1468
1469 UDFAcquireResourceExclusive(&(Vcb->PreallocResource),TRUE);
1470
1471 status = UDFInitAllocationCache(Vcb, AllocClass, &AllocCache, &lim, TRUE);
1472 if(!OS_SUCCESS(status)) {
1473 UDFReleaseResource(&(Vcb->PreallocResource));
1474 return status;
1475 }
1476 UDFPrint(("Store AllocationCache for %x, map %x\n", ParentLocation, Ext->Mapping));
1477
1478 for(i=0; i<lim; i++) {
1479 if(AllocCache[i].ParentLocation == LBA_NOT_ALLOCATED) {
1480 AdPrint((" stored in %x\n", i));
1481 AllocCache[i].Ext = (*Ext);
1482 AllocCache[i].Items = Items;
1483 AllocCache[i].ParentLocation = ParentLocation;
1484 UDFReleaseResource(&(Vcb->PreallocResource));
1485 return STATUS_SUCCESS;
1486 }
1487 }
1488 //
1489 AdPrint((" drop map %x (%x)\n", AllocCache[lim-1].Ext.Mapping, lim-1));
1490 switch(AllocClass) {
1491 case UDF_PREALLOC_CLASS_FE:
1492 UDFDiscardFESpace(Vcb, AllocCache[lim-1].Ext.Mapping, AllocCache[lim-1].Items);
1493 break;
1494 case UDF_PREALLOC_CLASS_DIR:
1495 UDFMarkSpaceAsXXX(Vcb, 0, AllocCache[lim-1].Ext.Mapping, AS_DISCARDED);
1496 break;
1497 }
1498 RtlMoveMemory(&(AllocCache[1]), &(AllocCache[0]), sizeof(UDF_ALLOCATION_CACHE_ITEM)*(lim-1));
1499 AllocCache[0].Ext = (*Ext);
1500 AllocCache[0].Items = Items;
1501 AllocCache[0].ParentLocation = ParentLocation;
1502 AdPrint((" stored in 0\n"));
1503 UDFReleaseResource(&(Vcb->PreallocResource));
1504 return STATUS_SUCCESS;
1505} // end UDFStoreCachedAllocation()
1506
1507OSSTATUS
1508UDFFlushAllCachedAllocations(
1509 IN PVCB Vcb,
1510 IN uint32 AllocClass
1511 )
1512{
1513 PUDF_ALLOCATION_CACHE_ITEM AllocCache;
1514 uint32 i, lim;
1515 OSSTATUS status;
1516
1517 UDFPrint(("Flush AllocationCache\n"));
1518 UDFAcquireResourceExclusive(&(Vcb->PreallocResource),TRUE);
1519
1520 status = UDFInitAllocationCache(Vcb, AllocClass, &AllocCache, &lim, FALSE);
1521 if(!OS_SUCCESS(status)) {
1522 UDFReleaseResource(&(Vcb->PreallocResource));
1523 return status;
1524 }
1525
1526 for(i=0; i<lim; i++) {
1527 if(AllocCache[i].ParentLocation != LBA_NOT_ALLOCATED) {
1528 switch(AllocClass) {
1529 case UDF_PREALLOC_CLASS_FE:
1530 UDFDiscardFESpace(Vcb, AllocCache[i].Ext.Mapping, AllocCache[i].Items);
1531 break;
1532 case UDF_PREALLOC_CLASS_DIR:
1533 UDFMarkSpaceAsXXX(Vcb, 0, AllocCache[i].Ext.Mapping, AS_DISCARDED);
1534 break;
1535 }
1536 }
1537 }
1538 MyFreePool__(AllocCache);
1539 switch(AllocClass) {
1540 case UDF_PREALLOC_CLASS_FE:
1541 Vcb->FEChargeCache = NULL;
1542 Vcb->FEChargeCacheMaxSize = 0;
1543 break;
1544 case UDF_PREALLOC_CLASS_DIR:
1545 Vcb->PreallocCache = NULL;
1546 Vcb->PreallocCacheMaxSize = 0;
1547 break;
1548 }
1549 UDFReleaseResource(&(Vcb->PreallocResource));
1550 //
1551 return STATUS_SUCCESS;
1552} // end UDFFlushAllCachedAllocations()
1553
1554/*
1555 This routine allocates space for FE of the file being created
1556 If FE-Charge is enabled it reserves an extent & allocates
1557 space in it. It works much faster then usual way both while
1558 allocating & accessing on disk
1559 If FE-Charge is disabled FE may be allocated at any suitable
1560 location
1561 */
1562OSSTATUS
1563UDFAllocateFESpace(
1564 IN PVCB Vcb,
1565 IN PUDF_FILE_INFO DirInfo,
1566 IN uint32 PartNum,
1567 IN PEXTENT_INFO FEExtInfo,
1568 IN uint32 Len
1569 )
1570{
1571#ifdef UDF_FE_ALLOCATION_CHARGE // UDF_FE_ALLOCATION_CHARGE
1572 OSSTATUS status;
1573 PEXTENT_INFO Ext;
1574 EXTENT_AD Extent;
1575 BOOLEAN retry = FALSE;
1576 uint32 i, lim;
1577
1578/*
1579 1. #Dir1#->*File* -> Dir1's FECharge
1580 2. #Dir1#->*Dir* -> Dir1's FECharge
1581 3. #Dir1#->*SDir* -> Dir1's FECharge
1582 4. Dir1->#SDir#->*Stream* -> Dir1's FEChargeSDir
1583 5. Dir1->#File#->*SDir* -> Dir1's FEChargeSDir
1584 6. Dir1->#Dir#->*SDir* -> (see p.2)
1585 7. Dir1->File->#SDir#->*Stream* -> Dir1's FEChargeSDir
1586 8. Dir1->Dir->#SDir#->*Stream* -> (see p.4)
1587
1588## ~ DirInfo
1589** ~ Object to be created
1590
1591*/
1592
1593// ASSERT(!FEExtInfo->Mapping);
1594 // check if DirInfo we are called with is a Directory
1595 // (it can be a file with SDir)
1596 if(!DirInfo || !DirInfo->Dloc->DirIndex ||
1597 ((lim = ((DirInfo->Dloc->FE_Flags & UDF_FE_FLAG_IS_SDIR) ? Vcb->FEChargeSDir : Vcb->FECharge)) <= 1))
1598#endif // UDF_FE_ALLOCATION_CHARGE
1599 return UDFAllocFreeExtent(Vcb, Len,
1600 UDFPartStart(Vcb, PartNum), UDFPartEnd(Vcb, PartNum), FEExtInfo, EXTENT_FLAG_VERIFY);
1601#ifdef UDF_FE_ALLOCATION_CHARGE // UDF_FE_ALLOCATION_CHARGE
1602
1603 Ext = &(DirInfo->Dloc->DirIndex->FECharge);
1604
1605 while(TRUE) {
1606
1607 if(!Ext->Mapping) {
1608 ULONG p_start;
1609 ULONG p_end;
1610 ULONG fe_loc;
1611 ULONG l1, l2;
1612
1613 p_start = UDFPartStart(Vcb, PartNum);
1614 p_end = UDFPartEnd(Vcb, PartNum);
1615 fe_loc = DirInfo->Dloc->FELoc.Mapping[0].extLocation;
1616
1617 status = UDFGetCachedAllocation(Vcb, fe_loc, Ext, NULL, UDF_PREALLOC_CLASS_FE);
1618 if(OS_SUCCESS(status)) {
1619 // do nothing, even do not unpack
1620 } else
1621 if(Vcb->LowFreeSpace) {
1622 status = UDFAllocFreeExtent(Vcb, Len << Vcb->LBlockSizeBits,p_start, p_end, FEExtInfo, EXTENT_FLAG_VERIFY);
1623 if(OS_SUCCESS(status)) {
1624 UDFPrint(("FE @ %x (1)\n", FEExtInfo->Mapping[0].extLocation ));
1625 }
1626 return status;
1627 } else {
1628 if(fe_loc > p_start + 512*16) {
1629 l1 = fe_loc - 512*16;
1630 } else {
1631 l1 = p_start;
1632 }
1633 if(fe_loc + 512*16 < p_end) {
1634 l2 = fe_loc + 512*16;
1635 } else {
1636 l2 = p_end;
1637 }
1638 status = UDFAllocFreeExtent(Vcb, lim << Vcb->LBlockSizeBits, l1, l2, Ext, EXTENT_FLAG_VERIFY);
1639 if(!OS_SUCCESS(status)) {
1640 status = UDFAllocFreeExtent(Vcb, lim << Vcb->LBlockSizeBits, (p_start+fe_loc)/2, (fe_loc+p_end)/2, Ext, EXTENT_FLAG_VERIFY);
1641 }
1642 if(!OS_SUCCESS(status)) {
1643 status = UDFAllocFreeExtent(Vcb, lim << Vcb->LBlockSizeBits, p_start, p_end, Ext, EXTENT_FLAG_VERIFY);
1644 }
1645 if(!OS_SUCCESS(status)) {
1646 status = UDFAllocFreeExtent(Vcb, lim << Vcb->LBlockSizeBits, p_start+1024, p_end-1024, Ext, EXTENT_FLAG_VERIFY);
1647 }
1648 if(!OS_SUCCESS(status = UDFAllocFreeExtent(Vcb, lim << Vcb->LBlockSizeBits, p_start, p_end, Ext, EXTENT_FLAG_VERIFY) )) {
1649 // can't pre-allocate space for multiple FEs. Try single FE
1650 UDFPrint(("allocate single FE entry\n"));
1651 status = UDFAllocFreeExtent(Vcb, Len,
1652 p_start, p_end, FEExtInfo, EXTENT_FLAG_VERIFY);
1653 if(OS_SUCCESS(status)) {
1654 UDFPrint(("FE @ %x (2)\n", FEExtInfo->Mapping[0].extLocation ));
1655 }
1656 return status;
1657 }
1658 status = UDFUnPackMapping(Vcb, Ext);
1659 if(!OS_SUCCESS(status)) {
1660 MyFreePool__(Ext->Mapping);
1661 Ext->Mapping = NULL;
1662 return status;
1663 }
1664 }
1665 }
1666
1667 for(i=0;i<lim;i++) {
1668 if( (Ext->Mapping[i].extLength >> 30) == EXTENT_NOT_RECORDED_ALLOCATED ) {
1669 Ext->Mapping[i].extLength &= UDF_EXTENT_LENGTH_MASK; // EXTENT_RECORDED_ALLOCATED
1670
1671 Extent.extLength = Vcb->LBlockSize | (EXTENT_NOT_RECORDED_ALLOCATED << 30);
1672 Extent.extLocation = Ext->Mapping[i].extLocation;
1673
1674 if(Vcb->BSBM_Bitmap) {
1675 uint32 lba = Ext->Mapping[i].extLocation;
1676 if(UDFGetBadBit((uint32*)(Vcb->BSBM_Bitmap), lba)) {
1677 UDFPrint(("Remove BB @ %x from FE charge\n", lba));
1678 Ext->Mapping[i].extLength |= (EXTENT_NOT_RECORDED_NOT_ALLOCATED << 30);
1679 Ext->Mapping[i].extLocation = 0;
1680 continue;
1681 }
1682 }
1683
1684 FEExtInfo->Mapping = UDFExtentToMapping(&Extent);
1685 if(!FEExtInfo->Mapping) {
1686 ASSERT(!(Ext->Mapping[i].extLength >> 30));
1687 Ext->Mapping[i].extLength |= (EXTENT_NOT_RECORDED_ALLOCATED << 30);
1688 return STATUS_INSUFFICIENT_RESOURCES;
1689 }
1690 UDFPrint(("FE @ %x (3)\n", FEExtInfo->Mapping[0].extLocation ));
1691 FEExtInfo->Length = Len;
1692 FEExtInfo->Offset = 0;
1693 FEExtInfo->Modified = TRUE;
1694 return STATUS_SUCCESS;
1695 }
1696 }
1697
1698 if(Vcb->LowFreeSpace) {
1699 status = UDFAllocFreeExtent(Vcb, Len,
1700 UDFPartStart(Vcb, PartNum), UDFPartEnd(Vcb, PartNum), FEExtInfo, EXTENT_FLAG_VERIFY);
1701 if(OS_SUCCESS(status)) {
1702 UDFPrint(("FE @ %x (4)\n", FEExtInfo->Mapping[0].extLocation ));
1703 }
1704 return status;
1705 }
1706 if(retry)
1707 return STATUS_INSUFFICIENT_RESOURCES;
1708
1709 // we can get here if there are no free slots in
1710 // preallocated FE charge. So, we should release
1711 // memory and try to allocate space for new FE charge.
1712 MyFreePool__(Ext->Mapping);
1713 Ext->Mapping = NULL;
1714 retry = TRUE;
1715 }
1716 return STATUS_INSUFFICIENT_RESOURCES;
1717#endif // UDF_FE_ALLOCATION_CHARGE
1718
1719} // end UDFAllocateFESpace()
1720
1721/*
1722 This routine frees space allocated for FE.
1723 */
1724void
1725UDFFreeFESpace(
1726 IN PVCB Vcb,
1727 IN PUDF_FILE_INFO DirInfo,
1728 IN PEXTENT_INFO FEExtInfo
1729 )
1730{
1731#ifdef UDF_FE_ALLOCATION_CHARGE // UDF_FE_ALLOCATION_CHARGE
1732 PEXTENT_INFO Ext;
1733 uint32 i, lim, j=-1;
1734 uint32 Lba;
1735
1736 // check if the DirInfo we are called with is a Directory
1737 // (it can be a file with SDir)
1738 if(DirInfo && DirInfo->Dloc->DirIndex &&
1739 (Ext = &(DirInfo->Dloc->DirIndex->FECharge))->Mapping) {
1740 if(!FEExtInfo->Mapping)
1741 return;
1742 Lba = FEExtInfo->Mapping[0].extLocation;
1743
1744 lim = (DirInfo->Dloc->FE_Flags & UDF_FE_FLAG_IS_SDIR) ? Vcb->FEChargeSDir : Vcb->FECharge;
1745 for(i=0;i<lim;i++) {
1746 if(Ext->Mapping[i].extLocation == Lba) {
1747 ASSERT(!(Ext->Mapping[i].extLength >> 30));
1748 Ext->Mapping[i].extLength |= (EXTENT_NOT_RECORDED_ALLOCATED << 30);
1749 goto clean_caller;
1750 }
1751 if(!Ext->Mapping[i].extLocation) {
1752 j = i;
1753 }
1754 }
1755 if(j != (ULONG)-1) {
1756 i = j;
1757 Ext->Mapping[i].extLocation = Lba;
1758 Ext->Mapping[i].extLength = Vcb->LBlockSize | (EXTENT_NOT_RECORDED_ALLOCATED << 30);
1759 goto clean_caller;
1760 }
1761 }
1762#endif // UDF_FE_ALLOCATION_CHARGE
1763 UDFMarkSpaceAsXXX(Vcb, 0, FEExtInfo->Mapping, AS_DISCARDED); // free
1764clean_caller:
1765 FEExtInfo->Mapping[0].extLocation = 0;
1766 FEExtInfo->Mapping[0].extLength = (EXTENT_NOT_RECORDED_NOT_ALLOCATED << 30);
1767 return;
1768} // end UDFFreeFESpace()
1769#endif //UDF_READ_ONLY_BUILD
1770
1771/*
1772 This routine flushes FE-Charge buffer, marks unused blocks as free
1773 in bitmap & releases memory allocated for FE-Charge management
1774 */
1775void
1776UDFFlushFESpace(
1777 IN PVCB Vcb,
1778 IN PUDF_DATALOC_INFO Dloc,
1779 IN BOOLEAN Discard
1780 )
1781{
1782#ifdef UDF_FE_ALLOCATION_CHARGE // UDF_FE_ALLOCATION_CHARGE
1783 PEXTENT_MAP Mapping;
1784 uint32 lim;
1785
1786 if(!(Mapping = Dloc->DirIndex->FECharge.Mapping))
1787 return;
1788
1789 lim = (Dloc->FE_Flags & UDF_FE_FLAG_IS_SDIR) ? Vcb->FEChargeSDir : Vcb->FECharge;
1790
1791 if(!Discard) {
1792 // cache it!
1793 if(OS_SUCCESS(UDFStoreCachedAllocation(Vcb,
1794 Dloc->FELoc.Mapping[0].extLocation,
1795 &Dloc->DirIndex->FECharge, lim, UDF_PREALLOC_CLASS_FE))) {
1796 Dloc->DirIndex->FECharge.Mapping = NULL;
1797 return;
1798 }
1799 }
1800 Dloc->DirIndex->FECharge.Mapping = NULL;
1801 UDFDiscardFESpace(Vcb, Mapping, lim);
1802#else // UDF_FE_ALLOCATION_CHARGE
1803 ASSERT(!Dloc->DirIndex->FECharge.Mapping);
1804 return;
1805#endif // UDF_FE_ALLOCATION_CHARGE
1806} // end UDFFlushFESpace()
1807
1808#ifndef UDF_READ_ONLY_BUILD
1809/*
1810 This routine rebuilds mapping on write attempts to Alloc-Not-Rec area.
1811 Here we assume that required area lays in a single frag.
1812 */
1813OSSTATUS
1814UDFMarkAllocatedAsRecorded(
1815 IN PVCB Vcb,
1816 IN int64 Offset,
1817 IN uint32 Length,
1818 IN PEXTENT_INFO ExtInfo // Extent array
1819 )
1820{
1821 uint32 i, len, lba, sLen;
1822 PEXTENT_MAP Extent = ExtInfo->Mapping; // Extent array
1823 PEXTENT_MAP NewExtent;
1824 uint32 BS = Vcb->BlockSize;
1825 uint32 LBS = Vcb->LBlockSize;
1826 uint32 BSh = Vcb->BlockSizeBits;
1827 BOOLEAN TryPack = TRUE;
1828#ifdef UDF_DBG
1829 int64 check_size;
1830#endif //UDF_DBG
1831 // I don't know what else comment can be added here.
1832 // Just belive that it works
1833 lba = UDFExtentOffsetToLba(Vcb, ExtInfo->Mapping, (Offset & ~((int64)LBS-1)), NULL, NULL, NULL, &i);
1834 if(i == (ULONG)-1) return STATUS_INVALID_PARAMETER;
1835#ifdef UDF_DBG
1836 check_size = UDFGetExtentLength(ExtInfo->Mapping);
1837 ASSERT(!(check_size & (LBS-1)));
1838#endif //UDF_DBG
1839 AdPrint(("Alloc->Rec ExtInfo %x, Extent %x\n", ExtInfo, Extent));
1840 if((Extent[i].extLength >> 30) == EXTENT_RECORDED_ALLOCATED) return STATUS_SUCCESS;
1841 if((Extent[i].extLength >> 30) == EXTENT_NOT_RECORDED_NOT_ALLOCATED) return STATUS_INVALID_PARAMETER;
1842 ASSERT((((uint32)Offset) & (LBS-1)) + Length <= (Extent[i].extLength & UDF_EXTENT_LENGTH_MASK));
1843 sLen = (( (((uint32)Offset) & (LBS-1)) + Length+LBS-1) & ~(LBS-1)) >> BSh;
1844 if((Extent[i].extLocation == lba) && (((Extent[i].extLength & UDF_EXTENT_LENGTH_MASK ) >> BSh) == sLen)) {
1845 // xxxxxx -> RRRRRR
1846 Extent[i].extLength &= UDF_EXTENT_LENGTH_MASK;
1847// Extent[i].extLength |= (EXTENT_RECORDED_ALLOCATED << 30); // = 0;
1848 ExtInfo->Modified = TRUE;
1849 if(i &&
1850 ((Extent[i-1].extLength >> 30) == EXTENT_RECORDED_ALLOCATED) &&
1851 (lba == (Extent[i-1].extLocation + ((len = Extent[i-1].extLength & UDF_EXTENT_LENGTH_MASK) >> BSh))) &&
1852 ((len + (Extent[i].extLength & UDF_EXTENT_LENGTH_MASK)) <= UDF_MAX_EXTENT_LENGTH) &&
1853 (i == ((UDFGetMappingLength(Extent) / sizeof(EXTENT_MAP)) - 2)) &&
1854 TRUE) {
1855 // make optimization for sequentially written files
1856 Extent[i-1].extLength += Extent[i].extLength;
1857 Extent[i].extLocation = 0;
1858 Extent[i].extLength = 0;
1859 } else {
1860 UDFPackMapping(Vcb, ExtInfo);
1861 }
1862 AdPrint(("Alloc->Rec (1) new %x\n", ExtInfo->Mapping));
1863#ifdef UDF_DBG
1864 ASSERT(check_size == UDFGetExtentLength(ExtInfo->Mapping));
1865#endif
1866 AdPrint(("Alloc->Rec: ExtInfo %x, Extent %x\n", ExtInfo, ExtInfo->Mapping));
1867 return STATUS_SUCCESS;
1868 }
1869 if(Extent[i].extLocation < lba) {
1870 if( (((Extent[i].extLength & UDF_EXTENT_LENGTH_MASK) >> BSh) - (lba - Extent[i].extLocation))
1871 > sLen ) {
1872 // xxxxxx -> xxRRxx
1873 NewExtent = (PEXTENT_MAP)MyAllocatePoolTag__(NonPagedPool , UDFGetMappingLength(Extent) + sizeof(EXTENT_MAP)*2,
1874 MEM_EXTMAP_TAG);
1875 if(!NewExtent) return STATUS_INSUFFICIENT_RESOURCES;
1876 Extent[i].extLength &= UDF_EXTENT_LENGTH_MASK;
1877 RtlCopyMemory((int8*)NewExtent, (int8*)Extent, i*sizeof(EXTENT_MAP));
1878 RtlCopyMemory((int8*)&(NewExtent[i+3]), (int8*)&(Extent[i+1]), len = UDFGetMappingLength(&(Extent[i+1])) );
1879 NewExtent[i].extLocation = Extent[i].extLocation;
1880 NewExtent[i].extLength = (lba - Extent[i].extLocation) << BSh;
1881 NewExtent[i+1].extLength = (Length+BS-1) & ~(BS-1);
1882 NewExtent[i+1].extLocation = lba;
1883 NewExtent[i+2].extLength = Extent[i].extLength - NewExtent[i].extLength - NewExtent[i+1].extLength;
1884 NewExtent[i+2].extLocation = lba + ((Length+BS-1) >> BSh);
1885 ASSERT(!(NewExtent[i].extLength >> 30));
1886 ASSERT(!(NewExtent[i+2].extLength >> 30));
1887 NewExtent[i].extLength |= (EXTENT_NOT_RECORDED_ALLOCATED << 30);
1888 NewExtent[i+2].extLength |= (EXTENT_NOT_RECORDED_ALLOCATED << 30);
1889 TryPack = FALSE;
1890 AdPrint(("Alloc->Rec (2) new %x\n", NewExtent));
1891 } else {
1892 // xxxxxx -> xxRRRR
1893 NewExtent = (PEXTENT_MAP)MyAllocatePoolTag__(NonPagedPool , UDFGetMappingLength(Extent) + sizeof(EXTENT_MAP),
1894 MEM_EXTMAP_TAG);
1895 if(!NewExtent) return STATUS_INSUFFICIENT_RESOURCES;
1896 Extent[i].extLength &= UDF_EXTENT_LENGTH_MASK;
1897 RtlCopyMemory((int8*)NewExtent, (int8*)Extent, i*sizeof(EXTENT_MAP));
1898 RtlCopyMemory((int8*)&(NewExtent[i+2]), (int8*)&(Extent[i+1]), len = UDFGetMappingLength(&(Extent[i+1])) );
1899 NewExtent[i].extLocation = Extent[i].extLocation;
1900 NewExtent[i].extLength = (lba - Extent[i].extLocation) << BSh;
1901 NewExtent[i+1].extLength = Extent[i].extLength - NewExtent[i].extLength;
1902 NewExtent[i+1].extLocation = lba;
1903 ASSERT(!(NewExtent[i].extLength >> 30));
1904 NewExtent[i].extLength |= (EXTENT_NOT_RECORDED_ALLOCATED << 30);
1905 AdPrint(("Alloc->Rec (3) new %x\n", NewExtent));
1906 }
1907 } else {
1908 // xxxxxx -> RRRRxx
1909 NewExtent = (PEXTENT_MAP)MyAllocatePoolTag__(NonPagedPool , UDFGetMappingLength(Extent) + sizeof(EXTENT_MAP),
1910 MEM_EXTMAP_TAG);
1911 if(!NewExtent) return STATUS_INSUFFICIENT_RESOURCES;
1912 Extent[i].extLength &= UDF_EXTENT_LENGTH_MASK;
1913 RtlCopyMemory((int8*)NewExtent, (int8*)Extent, i*sizeof(EXTENT_MAP));
1914 RtlCopyMemory((int8*)&(NewExtent[i+2]), (int8*)&(Extent[i+1]), len = UDFGetMappingLength(&(Extent[i+1])) );
1915 NewExtent[i].extLocation = Extent[i].extLocation;
1916 NewExtent[i].extLength = (Length+BS-1) & ~(BS-1);
1917 NewExtent[i+1].extLength = Extent[i].extLength - NewExtent[i].extLength;
1918 NewExtent[i+1].extLocation = Extent[i].extLocation + (NewExtent[i].extLength >> BSh);
1919 ASSERT(!(NewExtent[i+1].extLength >> 30));
1920 NewExtent[i+1].extLength |= (EXTENT_NOT_RECORDED_ALLOCATED << 30);
1921 AdPrint(("Alloc->Rec (4) new %x\n", NewExtent));
1922 }
1923
1924 //ASSERT(check_size == UDFGetExtentLength(Extent));
1925 //ASSERT(!(check_size & (LBS-1)));
1926
1927 AdPrint(("Free Extent %x (new %x)\n", Extent, NewExtent));
1928 MyFreePool__(Extent);
1929 ExtInfo->Modified = TRUE;
1930 ExtInfo->Mapping = NewExtent;
1931 if(TryPack)
1932 UDFPackMapping(Vcb, ExtInfo);
1933#ifdef UDF_DBG
1934 ASSERT(check_size == UDFGetExtentLength(ExtInfo->Mapping));
1935 ASSERT(!(check_size & (LBS-1)));
1936#endif
1937
1938 AdPrint(("Alloc->Rec: ExtInfo %x, Extent %x\n", ExtInfo, ExtInfo->Mapping));
1939
1940 return STATUS_SUCCESS;
1941} // end UDFMarkAllocatedAsRecorded()
1942
1943/*
1944 This routine rebuilds mapping on write attempts to Not-Alloc-Not-Rec area.
1945 Here we assume that required area lays in a single frag.
1946 */
1947OSSTATUS
1948UDFMarkNotAllocatedAsAllocated(
1949 IN PVCB Vcb,
1950 IN int64 Offset,
1951 IN uint32 Length,
1952 IN PEXTENT_INFO ExtInfo // Extent array
1953 )
1954{
1955 uint32 i, len, /*lba,*/ d, l, BOffs, j;
1956 PEXTENT_MAP Extent = ExtInfo->Mapping; // Extent array
1957 PEXTENT_MAP NewExtent;
1958// uint32 BS = Vcb->BlockSize;
1959 uint32 BSh = Vcb->BlockSizeBits;
1960 OSSTATUS status;
1961 EXTENT_INFO TmpExtInf;
1962 SIZE_T aLen, sLen;
1963 SIZE_T LBS = Vcb->LBlockSize;
1964 // I don't know what else comment can be added here.
1965 // Just belive that it works
1966 /*lba = */
1967#ifndef ALLOW_SPARSE
1968 BrutePoint();
1969#endif
1970 AdPrint(("Not->Alloc ExtInfo %x, Extent %x\n", ExtInfo, Extent));
1971 UDFExtentOffsetToLba(Vcb, ExtInfo->Mapping, Offset, NULL, NULL, NULL, &i);
1972 if(i == (ULONG)-1) return STATUS_INVALID_PARAMETER;
1973 if((Extent[i].extLength >> 30) != EXTENT_NOT_RECORDED_NOT_ALLOCATED) return STATUS_SUCCESS;
1974
1975 uint32 PartNum = UDFGetPartNumByPhysLba(Vcb, Extent[0].extLocation);
1976 BOffs = (uint32)(Offset >> BSh);
1977 // length of existing Not-Alloc-Not-Rec frag
1978 sLen = (( (((uint32)Offset) & (LBS-1)) + Length+LBS-1) & ~(LBS-1)) >> BSh;
1979 // required allocation length increment (in bytes)
1980 aLen = (uint32)( ((Offset+Length+LBS-1) & ~(LBS-1)) - (Offset & ~(LBS-1)));
1981
1982 // try to extend previous frag or allocate space _after_ it to
1983 // avoid backward seeks, if previous frag is not Not-Rec-Not-Alloc
1984 if(i && ((Extent[i-1].extLength >> 30) != EXTENT_NOT_RECORDED_NOT_ALLOCATED) ) {
1985 status = UDFAllocFreeExtent(Vcb, aLen,
1986 Extent[i-1].extLocation + ((Extent[i-1].extLength & UDF_EXTENT_LENGTH_MASK) >> BSh),
1987 min(UDFPartEnd(Vcb, PartNum), Extent[i-1].extLocation + ((Extent[i-1].extLength & UDF_EXTENT_LENGTH_MASK) >> BSh) + sLen ),
1988 &TmpExtInf, ExtInfo->Flags /*& EXTENT_FLAG_ALLOC_MASK*/);
1989 if(status == STATUS_DISK_FULL)
1990 // if there are not enough free blocks after that frag...
1991 goto try_alloc_anywhere;
1992 } else {
1993try_alloc_anywhere:
1994 // ... try to alloc required disk space anywhere
1995 status = UDFAllocFreeExtent(Vcb, aLen,
1996 UDFPartStart(Vcb, PartNum),
1997 UDFPartEnd(Vcb, PartNum),
1998 &TmpExtInf, ExtInfo->Flags /*& EXTENT_FLAG_ALLOC_MASK*/);
1999 }
2000 // check for successfull allocation
2001 if(!OS_SUCCESS(status)) {
2002 AdPrint(("Not->Alloc no free\n"));
2003 return status;
2004 }
2005 // get number of frags in allocated block
2006 d = (UDFGetMappingLength(TmpExtInf.Mapping) / sizeof(EXTENT_MAP)) - 1;
2007 // calculate number of existing blocks before the frag to be changed
2008 l=0;
2009 for(j=0; j<i; j++) {
2010 l += (uint32)((Extent[j].extLength & UDF_EXTENT_LENGTH_MASK) >> BSh);
2011 }
2012 // and now just update mapping...
2013 if( (l == BOffs) && (((Extent[j].extLength & UDF_EXTENT_LENGTH_MASK) >> BSh) == sLen) ) {
2014 // xxxxxx -> RRRRRR
2015 // (d-1) - since we have to raplace last frag of Extent with 1 or more frags of TmpExtInf.Mapping
2016 NewExtent = (PEXTENT_AD)MyAllocatePool__(NonPagedPool, UDFGetMappingLength(Extent) + (d-1)*sizeof(EXTENT_MAP) );
2017 if(!NewExtent) {
2018 MyFreePool__(TmpExtInf.Mapping);
2019 return STATUS_INSUFFICIENT_RESOURCES;
2020 }
2021 RtlCopyMemory((int8*)NewExtent, (int8*)Extent, i*sizeof(EXTENT_MAP));
2022 RtlCopyMemory((int8*)&(NewExtent[i]), (int8*)(TmpExtInf.Mapping), d*sizeof(EXTENT_MAP) );
2023 RtlCopyMemory((int8*)&(NewExtent[i+d]), (int8*)&(Extent[i+1]), len = UDFGetMappingLength(&(Extent[i+1])) );
2024 AdPrint(("Not->Alloc (1) new %x\n", NewExtent));
2025 } else
2026 if(l < BOffs) {
2027 // .ExtLength, BOffs & l are already aligned...
2028 if( (((Extent[i].extLength & UDF_EXTENT_LENGTH_MASK) >> BSh) - (BOffs-l)) > sLen ) {
2029 // xxxxxx -> xxRRxx
2030 NewExtent = (PEXTENT_AD)MyAllocatePool__(NonPagedPool, UDFGetMappingLength(Extent) + (d+1)*sizeof(EXTENT_MAP) );
2031 if(!NewExtent) {
2032 MyFreePool__(TmpExtInf.Mapping);
2033 return STATUS_INSUFFICIENT_RESOURCES;
2034 }
2035 RtlCopyMemory((int8*)NewExtent, (int8*)Extent, i*sizeof(EXTENT_MAP));
2036 RtlCopyMemory((int8*)&(NewExtent[i+1]), (int8*)(TmpExtInf.Mapping), d*sizeof(EXTENT_MAP) );
2037 RtlCopyMemory((int8*)&(NewExtent[i+d+2]), (int8*)&(Extent[i+1]), len = UDFGetMappingLength(&(Extent[i+1])) );
2038 NewExtent[i].extLocation = 0;
2039 NewExtent[i].extLength = (BOffs - l) << BSh;
2040 NewExtent[i+d+1].extLength = Extent[i].extLength - NewExtent[i].extLength - aLen;
2041 NewExtent[i+d+1].extLocation = 0;
2042 NewExtent[i].extLength |= (EXTENT_NOT_RECORDED_NOT_ALLOCATED << 30);
2043 NewExtent[i+d+1].extLength |= (EXTENT_NOT_RECORDED_NOT_ALLOCATED << 30);
2044 AdPrint(("Not->Alloc (2) new %x\n", NewExtent));
2045 } else {
2046 // xxxxxx -> xxRRRR
2047 NewExtent = (PEXTENT_AD)MyAllocatePool__(NonPagedPool, UDFGetMappingLength(Extent) + d*sizeof(EXTENT_MAP) );
2048 if(!NewExtent) {
2049 MyFreePool__(TmpExtInf.Mapping);
2050 return STATUS_INSUFFICIENT_RESOURCES;
2051 }
2052 RtlCopyMemory((int8*)NewExtent, (int8*)Extent, i*sizeof(EXTENT_MAP));
2053 RtlCopyMemory((int8*)&(NewExtent[i+1]), (int8*)(TmpExtInf.Mapping), d*sizeof(EXTENT_MAP) );
2054 RtlCopyMemory((int8*)&(NewExtent[i+d+1]), (int8*)&(Extent[i+1]), len = UDFGetMappingLength(&(Extent[i+1])) );
2055 NewExtent[i].extLocation = 0;
2056 NewExtent[i].extLength = (BOffs - l) << BSh;
2057 NewExtent[i].extLength |= (EXTENT_NOT_RECORDED_NOT_ALLOCATED << 30);
2058 AdPrint(("Not->Alloc (3) new %x\n", NewExtent));
2059 }
2060 } else {
2061 // xxxxxx -> RRRRxx
2062 NewExtent = (PEXTENT_AD)MyAllocatePool__(NonPagedPool, UDFGetMappingLength(Extent) + d*sizeof(EXTENT_MAP) );
2063 if(!NewExtent) {
2064 MyFreePool__(TmpExtInf.Mapping);
2065 return STATUS_INSUFFICIENT_RESOURCES;
2066 }
2067 RtlCopyMemory((int8*)NewExtent, (int8*)Extent, i*sizeof(EXTENT_MAP));
2068 RtlCopyMemory((int8*)&(NewExtent[i]), (int8*)(TmpExtInf.Mapping), d*sizeof(EXTENT_MAP) );
2069 RtlCopyMemory((int8*)&(NewExtent[i+d+1]), (int8*)&(Extent[i+1]), len = UDFGetMappingLength(&(Extent[i+1])) );
2070 NewExtent[i+d].extLength = (Extent[i].extLength & UDF_EXTENT_LENGTH_MASK) - aLen;
2071 NewExtent[i+d].extLocation = 0;
2072 NewExtent[i+d].extLength |= (EXTENT_NOT_RECORDED_NOT_ALLOCATED << 30);
2073 AdPrint(("Not->Alloc (4) new %x\n", NewExtent));
2074 }
2075
2076 AdPrint(("Free Extent %x, TmpExtInf.Mapping, (new %x)\n", Extent, TmpExtInf.Mapping, NewExtent));
2077 MyFreePool__(Extent);
2078 MyFreePool__(TmpExtInf.Mapping);
2079 ExtInfo->Modified = TRUE;
2080 ExtInfo->Mapping = NewExtent;
2081
2082 AdPrint(("Not->Alloc: ExtInfo %x, Extent %x\n", ExtInfo, ExtInfo->Mapping));
2083
2084 return STATUS_SUCCESS;
2085} // end UDFMarkNotAllocatedAsAllocated()
2086
2087//#if 0
2088/*
2089 This routine rebuilds mapping on write zero attempts to
2090 Alloc-Not-Rec area.
2091 Here we assume that required area lays in a single frag.
2092 */
2093OSSTATUS
2094UDFMarkAllocatedAsNotXXX(
2095 IN PVCB Vcb,
2096 IN int64 Offset,
2097 IN uint32 Length,
2098 IN PEXTENT_INFO ExtInfo, // Extent array
2099 IN BOOLEAN Deallocate
2100 )
2101{
2102 uint32 i, len, /*lba, d,*/ l, BOffs, j;
2103 PEXTENT_MAP Extent = ExtInfo->Mapping; // Extent array
2104 PEXTENT_MAP NewExtent;
2105// EXTENT_MAP TmpExtent;
2106// uint32 BS = Vcb->BlockSize;
2107 uint32 BSh = Vcb->BlockSizeBits;
2108// OSSTATUS status;
2109 EXTENT_INFO TmpExtInf;
2110 uint32 aLen, sLen;
2111 uint32 flags;
2112 uint32 target_flags = Deallocate ?
2113 EXTENT_NOT_RECORDED_NOT_ALLOCATED :
2114 EXTENT_NOT_RECORDED_ALLOCATED;
2115 SIZE_T LBS = Vcb->LBlockSize;
2116 EXTENT_MAP DeadMapping[2];
2117 // I don't know what else comment can be added here.
2118 // Just belive that it works
2119 /*lba = */
2120#ifndef ALLOW_SPARSE
2121 if(Deallocate) {
2122 BrutePoint();
2123 }
2124#endif
2125
2126 AdPrint(("Alloc->Not ExtInfo %x, Extent %x\n", ExtInfo, Extent));
2127
2128 DeadMapping[0].extLocation =
2129 UDFExtentOffsetToLba(Vcb, ExtInfo->Mapping, Offset, NULL, NULL, NULL, &i);
2130 if(i == (ULONG)-1) {
2131 BrutePoint();
2132 return STATUS_INVALID_PARAMETER;
2133 }
2134 DeadMapping[0].extLength = Extent[i].extLength;
2135 DeadMapping[1].extLocation =
2136 DeadMapping[1].extLength = 0;
2137 TmpExtInf.Mapping = (PEXTENT_MAP)&DeadMapping;
2138 TmpExtInf.Offset = 0;
2139 TmpExtInf.Length = Extent[i].extLength & UDF_EXTENT_LENGTH_MASK;
2140
2141 flags = Extent[i].extLength >> 30;
2142 if(flags == target_flags) return STATUS_SUCCESS;
2143
2144// uint32 PartNum = UDFGetPartNumByPhysLba(Vcb, Extent[0].extLocation);
2145 BOffs = (uint32)(Offset >> BSh);
2146 // length of existing Alloc-(Not-)Rec frag (in sectors)
2147 sLen = (( (((uint32)Offset) & (LBS-1)) + Length+LBS-1) & ~(LBS-1)) >> BSh;
2148 // required deallocation length increment (in bytes)
2149 aLen = (uint32)( ((Offset+Length+LBS-1) & ~(LBS-1)) - (Offset & ~(LBS-1)) );
2150
2151 l=0;
2152 for(j=0; j<i; j++) {
2153 l += (uint32)((Extent[j].extLength & UDF_EXTENT_LENGTH_MASK) >> BSh);
2154 }
2155 flags <<= 30;
2156 if( (l == BOffs) && (((Extent[j].extLength & UDF_EXTENT_LENGTH_MASK) >> BSh) == sLen) ) {
2157 // xxxxxx -> RRRRRR
2158 Extent[i].extLocation = 0;
2159 Extent[i].extLength = (Extent[i].extLength & UDF_EXTENT_LENGTH_MASK) | flags;
2160 NewExtent = Extent;
2161 Extent = NULL;
2162 AdPrint(("Alloc->Not (1) NewExtent = Extent = %x\n", NewExtent));
2163 } else
2164 if(l < BOffs) {
2165 // .ExtLength, BOffs & l are already aligned...
2166 if( (((Extent[i].extLength & UDF_EXTENT_LENGTH_MASK) >> BSh) - (BOffs-l)) > sLen ) {
2167 // xxxxxx -> xxRRxx
2168 NewExtent = (PEXTENT_MAP)MyAllocatePool__(NonPagedPool, UDFGetMappingLength(Extent) + 2*sizeof(EXTENT_MAP) );
2169 if(!NewExtent) {
2170 return STATUS_INSUFFICIENT_RESOURCES;
2171 }
2172 RtlCopyMemory((int8*)NewExtent, (int8*)Extent, i*sizeof(EXTENT_MAP));
2173 RtlCopyMemory((int8*)&(NewExtent[i+3]), (int8*)&(Extent[i+1]), len = UDFGetMappingLength(&(Extent[i+1])) );
2174 NewExtent[i].extLength = (BOffs - l) << BSh;
2175 NewExtent[i].extLength |= flags;
2176 NewExtent[i+1].extLocation = 0;
2177 NewExtent[i+1].extLength = aLen | (target_flags << 30);
2178 NewExtent[i+2].extLength = (Extent[i].extLength & UDF_EXTENT_LENGTH_MASK) -
2179 (NewExtent[i].extLength & UDF_EXTENT_LENGTH_MASK) - aLen ;
2180 NewExtent[i+2].extLocation = Extent[i].extLocation +
2181 (NewExtent[i+2].extLength >> BSh);
2182 NewExtent[i+2].extLength |= flags;
2183 AdPrint(("Alloc->Not (2) new %x\n", NewExtent));
2184 } else {
2185 // xxxxxx -> xxRRRR
2186 NewExtent = (PEXTENT_MAP)MyAllocatePool__(NonPagedPool, UDFGetMappingLength(Extent) + sizeof(EXTENT_MAP) );
2187 if(!NewExtent) {
2188 return STATUS_INSUFFICIENT_RESOURCES;
2189 }
2190 RtlCopyMemory((int8*)NewExtent, (int8*)Extent, i*sizeof(EXTENT_MAP));
2191 RtlCopyMemory((int8*)&(NewExtent[i+2]), (int8*)&(Extent[i+1]), len = UDFGetMappingLength(&(Extent[i+1])) );
2192 NewExtent[i].extLength = ((BOffs - l) << BSh) | flags;
2193 NewExtent[i+1].extLocation = 0;
2194 NewExtent[i+1].extLength = aLen | (target_flags << 30);
2195 AdPrint(("Alloc->Not (3) new %x\n", NewExtent));
2196 }
2197 } else {
2198 // xxxxxx -> RRRRxx
2199 NewExtent = (PEXTENT_MAP)MyAllocatePool__(NonPagedPool, UDFGetMappingLength(Extent) + sizeof(EXTENT_MAP) );
2200 if(!NewExtent) {
2201 return STATUS_INSUFFICIENT_RESOURCES;
2202 }
2203 RtlCopyMemory((int8*)NewExtent, (int8*)Extent, i*sizeof(EXTENT_MAP));
2204 RtlCopyMemory((int8*)&(NewExtent[i+2]), (int8*)&(Extent[i+1]), len = UDFGetMappingLength(&(Extent[i+1])) );
2205 NewExtent[i+1].extLength = (Extent[i].extLength & UDF_EXTENT_LENGTH_MASK) - aLen;
2206 NewExtent[i+1].extLength |= flags;
2207 NewExtent[i].extLocation = 0;
2208 NewExtent[i].extLength = aLen | (target_flags << 30);
2209 AdPrint(("Alloc->Not (4) new %x\n", NewExtent));
2210 }
2211
2212 if(Deallocate)
2213 UDFMarkSpaceAsXXX(Vcb, (-1), TmpExtInf.Mapping, AS_DISCARDED); // mark as free
2214
2215 ExtInfo->Modified = TRUE;
2216 ExtInfo->Mapping = NewExtent;
2217
2218 AdPrint(("Alloc->Not: ExtInfo %x, Extent %x\n", ExtInfo, ExtInfo->Mapping));
2219
2220 if(Extent) {
2221 AdPrint(("Alloc->Not kill %x\n", Extent));
2222 MyFreePool__(Extent);
2223 } else {
2224 AdPrint(("Alloc->Not keep %x\n", Extent));
2225 }
2226
2227 return STATUS_SUCCESS;
2228} // end UDFMarkAllocatedAsNotXXX()
2229//#endif //0
2230
2231/*
2232 This routine resizes extent & updates associated mapping
2233 */
2234OSSTATUS
2235UDFResizeExtent(
2236 IN PVCB Vcb,
2237 IN uint32 PartNum,
2238 IN int64 Length, // Required Length
2239 IN BOOLEAN AlwaysInIcb, // must be TRUE for AllocDescs
2240 OUT PEXTENT_INFO ExtInfo
2241 )
2242{
2243 uint32 i, flags, lba;
2244 SIZE_T lim;
2245 int64 l;
2246 OSSTATUS status;
2247 EXTENT_INFO TmpExtInf;
2248 EXTENT_MAP TmpMapping[2];
2249 uint32 s, pe, BSh, PS;
2250 SIZE_T req_s;
2251 SIZE_T LBS = Vcb->LBlockSize;
2252 BSh = Vcb->BlockSizeBits;
2253 PS = Vcb->WriteBlockSize >> Vcb->BlockSizeBits;
2254 uint32 MaxGrow = (UDF_MAX_EXTENT_LENGTH & ~(LBS-1));
2255 BOOLEAN Sequential = FALSE;
2256
2257 ASSERT(PartNum < 3);
2258
2259 ExtPrint(("Resize ExtInfo %x, %I64x -> %I64x\n", ExtInfo, ExtInfo->Length, Length));
2260
2261 if(ExtInfo->Flags & EXTENT_FLAG_CUT_PREALLOCATED) {
2262 AdPrint((" cut preallocated\n"));
2263 } else
2264 if(ExtInfo->Length == Length) {
2265 return STATUS_SUCCESS;
2266 }
2267 if((ExtInfo->Flags & EXTENT_FLAG_ALLOC_MASK) == EXTENT_FLAG_ALLOC_SEQUENTIAL) {
2268 MaxGrow &= ~(Vcb->WriteBlockSize-1);
2269 Sequential = TRUE;
2270 }
2271
2272 UDFCheckSpaceAllocation(Vcb, 0, ExtInfo->Mapping, AS_USED); // check if used
2273 if(ExtInfo->Offset) {
2274 if(ExtInfo->Offset + Length <= LBS) {
2275 ExtPrint(("Resize IN-ICB\n"));
2276 ExtInfo->Length = Length;
2277 return STATUS_SUCCESS;
2278 }
2279 if(!AlwaysInIcb) // simulate unused 1st sector in extent
2280 ExtInfo->Offset = LBS; // it'll be truncated later
2281 Length += ExtInfo->Offset; // convert to real offset in extent
2282 }
2283 lba = UDFExtentOffsetToLba(Vcb, ExtInfo->Mapping, Length, NULL, NULL, &flags, &i);
2284 if(ExtInfo->Length < Length) {
2285 // increase extent
2286 if(OS_SUCCESS(UDFGetCachedAllocation(Vcb, ExtInfo->Mapping[0].extLocation,
2287 &TmpExtInf, NULL, UDF_PREALLOC_CLASS_DIR))) {
2288 AdPrint(("Resize found cached(1)\n"));
2289 ExtInfo->Mapping = UDFMergeMappings(ExtInfo->Mapping, TmpExtInf.Mapping);
2290 MyFreePool__(TmpExtInf.Mapping);
2291 }
2292 if((l = UDFGetExtentLength(ExtInfo->Mapping)) >= Length) {
2293 // we have enough space inside extent
2294 ExtInfo->Length = Length;
2295 AdPrint(("Resize do nothing (1)\n"));
2296 } else /*if(lba == LBA_OUT_OF_EXTENT)*/ {
2297
2298 Length -= ExtInfo->Offset;
2299 if(/*Length && l &&*/ (l % MaxGrow) &&
2300 (Length-1)/MaxGrow != (l-1)/MaxGrow) {
2301 AdPrint(("Crossing MAX_FRAG boundary...\n"));
2302 int64 l2 = ((l-1)/MaxGrow + 1)*MaxGrow;
2303 status = UDFResizeExtent(Vcb, PartNum, l2, AlwaysInIcb, ExtInfo);
2304 if(!OS_SUCCESS(status)) {
2305 UDFPrint(("Sub-call to UDFResizeExtent() failed (%x)\n", status));
2306 return status;
2307 }
2308 l = ExtInfo->Length;
2309 ASSERT(l == l2);
2310 }
2311 while((Length - l) > MaxGrow) {
2312 status = UDFResizeExtent(Vcb, PartNum, l+MaxGrow, AlwaysInIcb, ExtInfo);
2313 if(!OS_SUCCESS(status)) {
2314 UDFPrint(("Sub-call (2) to UDFResizeExtent() failed (%x)\n", status));
2315 return status;
2316 }
2317 l = ExtInfo->Length;
2318 }
2319 Length += ExtInfo->Offset;
2320 // at first, try to resize existing frag
2321#ifndef UDF_ALLOW_FRAG_AD
2322 i = UDFGetMappingLength(ExtInfo->Mapping);
2323 if(i > (LBS-sizeof(EXTENDED_FILE_ENTRY))) {
2324 // this is very important check since we will not
2325 // be able to _record_ too long AllocDesc because of
2326 // some DEMO limitations in UDFBuildXXXAllocDescs()
2327 AdPrint((" DISK_FULL\n"));
2328 return STATUS_DISK_FULL;
2329 }
2330 i /= sizeof(EXTENT_MAP);
2331#else //UDF_ALLOW_FRAG_AD
2332 i = UDFGetMappingLength(ExtInfo->Mapping) / sizeof(EXTENT_MAP);
2333#endif //UDF_ALLOW_FRAG_AD
2334#ifdef ALLOW_SPARSE
2335 if(!AlwaysInIcb && !(ExtInfo->Offset) &&
2336 (Length - l >= (Vcb->SparseThreshold << BSh))) {
2337 // last frag will be Not-Alloc-Not-Rec...
2338 AdPrint(("Resize sparse (2)\n"));
2339 RtlZeroMemory(&TmpExtInf, sizeof(EXTENT_INFO));
2340 TmpExtInf.Mapping = (PEXTENT_MAP)MyAllocatePoolTag__(NonPagedPool , sizeof(EXTENT_MAP)*2,
2341 MEM_EXTMAP_TAG);
2342 if(!TmpExtInf.Mapping) return STATUS_INSUFFICIENT_RESOURCES;
2343 TmpExtInf.Mapping[0].extLength = (((uint32)(Length - l) + LBS-1) & ~(LBS-1)) | (EXTENT_NOT_RECORDED_NOT_ALLOCATED << 30);
2344 TmpExtInf.Mapping[0].extLocation =// 0;
2345 TmpExtInf.Mapping[1].extLength =
2346 TmpExtInf.Mapping[1].extLocation = 0;
2347 l = Length;
2348 ExtInfo->Mapping = UDFMergeMappings(ExtInfo->Mapping, TmpExtInf.Mapping);
2349 MyFreePool__(TmpExtInf.Mapping);
2350 } else
2351#endif //ALLOW_SPARSE
2352 // allocate some sectors
2353 if(i>1 && !(ExtInfo->Offset)) {
2354 i-=2;
2355 // check if Not-Alloc-Not-Rec at the end of mapping
2356 if((uint32)Length - (uint32)l + (ExtInfo->Mapping[i].extLength & UDF_EXTENT_LENGTH_MASK) > MaxGrow) {
2357 // do nothing, but jump directly to allocator
2358 } else
2359 if((ExtInfo->Mapping[i].extLength >> 30) == EXTENT_NOT_RECORDED_NOT_ALLOCATED) {
2360 AdPrint(("Resize grow sparse (3)\n"));
2361 ExtInfo->Mapping[i].extLength +=
2362 (((uint32)Length-(uint32)l+LBS-1) & ~(LBS-1)) ;
2363 l = Length;
2364 // check if Alloc-Not-Rec at the end of mapping
2365 } else if((ExtInfo->Mapping[i].extLength >> 30) == EXTENT_NOT_RECORDED_ALLOCATED) {
2366 AdPrint(("Resize grow Not-Rec (3)\n"));
2367 // current length of last frag
2368 s = ((ExtInfo->Mapping[i].extLength & UDF_EXTENT_LENGTH_MASK) >> BSh);
2369 // prefered location of the next frag
2370 lba = ExtInfo->Mapping[i].extLocation + s;
2371 pe=UDFPartEnd(Vcb,PartNum);
2372 // maximum frag length
2373 if(Sequential) {
2374 lim = (((uint32)UDF_MAX_EXTENT_LENGTH) >> BSh) & ~(PS-1);
2375 } else {
2376 lim = (((uint32)UDF_MAX_EXTENT_LENGTH) >> BSh) & ~(LBS-1);
2377 }
2378 // required last extent length
2379 req_s = s + (uint32)( (((Length + LBS - 1) & ~(LBS-1)) -
2380 ((l + LBS - 1) & ~(LBS-1)) ) >> BSh);
2381 if(lim > req_s) {
2382 lim = req_s;
2383 }
2384 UDFAcquireResourceExclusive(&(Vcb->BitMapResource1),TRUE);
2385/* if((ExtInfo->Flags & EXTENT_FLAG_SEQUENTIAL) &&
2386 ((Length & ~(PS-1)) > (l & ~(PS-1))) &&
2387 TRUE) {
2388 status = UDFResizeExtent(Vcb, PartNum, l+MaxGrow, AlwaysInIcb, ExtInfo);
2389 }*/
2390 // how many sectors we should add
2391 req_s = lim - s;
2392 ASSERT(req_s);
2393 if((lba < pe) && UDFGetFreeBit(Vcb->FSBM_Bitmap, lba)) {
2394 s += UDFGetBitmapLen((uint32*)(Vcb->FSBM_Bitmap), lba, min(pe, lba+req_s-1));
2395 }
2396/* for(s1=lba; (s<lim) && (s1<pe) && UDFGetFreeBit(Vcb->FSBM_Bitmap, s1); s1++) {
2397 s++;
2398 }*/
2399 if(s==lim) {
2400 // we can just increase the last frag
2401 AdPrint(("Resize grow last Not-Rec (4)\n"));
2402 ExtInfo->Mapping[i].extLength = (lim << BSh) | (EXTENT_NOT_RECORDED_ALLOCATED << 30);
2403 l = Length;
2404 UDFMarkSpaceAsXXXNoProtect(Vcb, 0, &(ExtInfo->Mapping[i]), AS_USED); // mark as used
2405 } else {
2406 // we get here if simple increasing of last frag failed
2407 // it worth truncating last frag and try to allocate
2408 // all required data as a single frag
2409
2410/* if(Sequential && s>=PS) {
2411 s &= ~(PS-1);
2412 AdPrint(("Resize grow last Not-Rec (4/2)\n"));
2413 ExtInfo->Mapping[i].extLength = (s << BSh) | (EXTENT_NOT_RECORDED_ALLOCATED << 30);
2414 l += (s << BSh);
2415 UDFMarkSpaceAsXXXNoProtect(Vcb, 0, &(ExtInfo->Mapping[i]), AS_USED); // mark as used
2416 }*/
2417 AdPrint(("Resize reloc last Not-Rec (5)\n"));
2418 TmpExtInf.Mapping = (PEXTENT_MAP)MyAllocatePoolTag__(NonPagedPool , (i+1)*sizeof(EXTENT_MAP),
2419 MEM_EXTMAP_TAG);
2420 if(!TmpExtInf.Mapping) {
2421 UDFPrint(("UDFResizeExtent: !TmpExtInf.Mapping\n"));
2422 UDFReleaseResource(&(Vcb->BitMapResource1));
2423 return STATUS_INSUFFICIENT_RESOURCES;
2424 }
2425 RtlCopyMemory(TmpExtInf.Mapping, ExtInfo->Mapping, i*sizeof(EXTENT_MAP));
2426 TmpExtInf.Mapping[i].extLength =
2427 TmpExtInf.Mapping[i].extLocation = 0;
2428 TmpExtInf.Offset = ExtInfo->Offset;
2429 l -= (ExtInfo->Mapping[i].extLength & UDF_EXTENT_LENGTH_MASK);
2430 TmpExtInf.Length = l;
2431 ASSERT(i || !ExtInfo->Offset);
2432 UDFMarkSpaceAsXXXNoProtect(Vcb, 0, &(ExtInfo->Mapping[i]), AS_DISCARDED); // mark as free
2433 MyFreePool__(ExtInfo->Mapping);
2434 (*ExtInfo) = TmpExtInf;
2435 }
2436 UDFCheckSpaceAllocation(Vcb, 0, ExtInfo->Mapping, AS_USED); // check if used
2437 UDFReleaseResource(&(Vcb->BitMapResource1));
2438 // check if Alloc-Rec
2439 } else {
2440 // current length of last frag
2441 s = ((ExtInfo->Mapping[i].extLength & UDF_EXTENT_LENGTH_MASK) >> BSh);
2442 // prefered location of the next frag
2443 lba = ExtInfo->Mapping[i].extLocation + s;
2444 pe=UDFPartEnd(Vcb,PartNum);
2445 // maximum frag length
2446 if(Sequential) {
2447 lim = (((uint32)UDF_MAX_EXTENT_LENGTH) >> BSh) & ~(PS-1);
2448 } else {
2449 lim = (((uint32)UDF_MAX_EXTENT_LENGTH) >> BSh) & ~(LBS-1);
2450 }
2451 // required last extent length
2452 req_s = s + (uint32)( (((Length + LBS - 1) & ~(LBS-1)) -
2453 ((l + LBS - 1) & ~(LBS-1)) ) >> BSh);
2454 if(lim > req_s) {
2455 lim = req_s;
2456 }
2457// s=0;
2458 // how many sectors we should add
2459 req_s = lim - s;
2460 if(req_s) {
2461 uint32 d=0;
2462
2463 UDFAcquireResourceExclusive(&(Vcb->BitMapResource1),TRUE);
2464 //ASSERT(req_s);
2465 if((lba < pe) && UDFGetFreeBit(Vcb->FSBM_Bitmap, lba)) {
2466 s += (d = UDFGetBitmapLen((uint32*)(Vcb->FSBM_Bitmap), lba, min(pe, lba+req_s-1)));
2467 }
2468 /* for(s1=lba; (s<lim) && (s1<pe) && UDFGetFreeBit(Vcb->FSBM_Bitmap, s1); s1++) {
2469 s++;
2470 }*/
2471
2472 if(s==lim) {
2473 AdPrint(("Resize grow last Rec (6)\n"));
2474 // we can just increase last frag
2475 TmpMapping[0].extLength = req_s << BSh;
2476 TmpMapping[0].extLocation = lba;
2477 TmpMapping[1].extLength =
2478 TmpMapping[1].extLocation = 0;
2479 UDFMarkSpaceAsXXXNoProtect(Vcb, 0, &TmpMapping[0], AS_USED); // mark as used
2480 l += (s << BSh) - (ExtInfo->Mapping[i].extLength & UDF_EXTENT_LENGTH_MASK);
2481 ExtInfo->Mapping[i].extLength = (ExtInfo->Mapping[i].extLength & UDF_EXTENT_FLAG_MASK) | (s << BSh);
2482 } else if(d) {
2483 AdPrint(("Resize part-grow last Rec (6)\n"));
2484 // increase last frag, then alloc rest
2485 TmpMapping[0].extLength = d << BSh;
2486 TmpMapping[0].extLocation = lba;
2487 TmpMapping[1].extLength =
2488 TmpMapping[1].extLocation = 0;
2489 UDFMarkSpaceAsXXXNoProtect(Vcb, 0, &TmpMapping[0], AS_USED); // mark as used
2490 l += (s << BSh) - (ExtInfo->Mapping[i].extLength & UDF_EXTENT_LENGTH_MASK);
2491 ExtInfo->Mapping[i].extLength = (ExtInfo->Mapping[i].extLength & UDF_EXTENT_FLAG_MASK) | (s << BSh);
2492 } else {
2493 AdPrint(("Can't grow last Rec (6)\n"));
2494 }
2495 UDFReleaseResource(&(Vcb->BitMapResource1));
2496 } else {
2497 AdPrint(("Max frag length reached (6)\n"));
2498 }
2499 }
2500 }
2501 if(l < Length) {
2502 // we get here if simple increasing of the last frag failed
2503 AdPrint(("Resize add new frag (7)\n"));
2504 if(l < LBS && Length >= LBS &&
2505 (ExtInfo->Flags & EXTENT_FLAG_ALLOC_MASK) == EXTENT_FLAG_ALLOC_SEQUENTIAL) {
2506 AdPrint(("Resize tune for SEQUENTIAL i/o\n"));
2507 }
2508 status = UDFAllocFreeExtent(Vcb, Length - l,
2509 UDFPartStart(Vcb, PartNum),
2510 UDFPartEnd(Vcb, PartNum),
2511 &TmpExtInf,
2512 ExtInfo->Flags /*& EXTENT_FLAG_ALLOC_MASK*/);
2513 if(!OS_SUCCESS(status)) {
2514 UDFPrint(("UDFResizeExtent: UDFAllocFreeExtent() failed (%x)\n", status));
2515 return status;
2516 }
2517 ExtInfo->Mapping = UDFMergeMappings(ExtInfo->Mapping, TmpExtInf.Mapping);
2518 MyFreePool__(TmpExtInf.Mapping);
2519 }
2520 UDFPackMapping(Vcb, ExtInfo);
2521 }
2522 } else
2523 if(Length) {
2524 // decrease extent
2525 AdPrint(("Resize cut (8)\n"));
2526 lba = UDFExtentOffsetToLba(Vcb, ExtInfo->Mapping, Length-1, NULL, &lim, &flags, &i);
2527 i++;
2528 ASSERT(lba != LBA_OUT_OF_EXTENT);
2529 ASSERT(lba != LBA_NOT_ALLOCATED);
2530 ASSERT(i);
2531 if(ExtInfo->Mapping[i].extLength) {
2532 UDFCheckSpaceAllocation(Vcb, 0, &(ExtInfo->Mapping[i]), AS_USED); // check if used
2533 if(!ExtInfo->Offset && (ExtInfo->Flags & EXTENT_FLAG_PREALLOCATED)) {
2534
2535 AdPrint(("Resize try save cutted (8)\n"));
2536 RtlZeroMemory(&TmpExtInf, sizeof(EXTENT_INFO));
2537 s = UDFGetMappingLength(&(ExtInfo->Mapping[i]));
2538
2539 TmpExtInf.Mapping = (PEXTENT_MAP)MyAllocatePoolTag__(NonPagedPool , s, MEM_EXTMAP_TAG);
2540 if(TmpExtInf.Mapping) {
2541 RtlCopyMemory(TmpExtInf.Mapping, &(ExtInfo->Mapping[i]), s);
2542 AdPrint(("Resize save cutted (8)\n"));
2543 if(OS_SUCCESS(UDFStoreCachedAllocation(Vcb, ExtInfo->Mapping[0].extLocation,
2544 &TmpExtInf, 0, UDF_PREALLOC_CLASS_DIR))) {
2545 ExtInfo->Mapping[i].extLength = 0;
2546 ExtInfo->Mapping[i].extLocation = 0;
2547 goto tail_cached;
2548 }
2549 }
2550 }
2551 UDFMarkSpaceAsXXX(Vcb, 0, &(ExtInfo->Mapping[i]), AS_DISCARDED); // mark as free
2552tail_cached:;
2553 }
2554 if((lim-1 >= LBS) &&
2555 (flags != EXTENT_NOT_RECORDED_NOT_ALLOCATED)) {
2556 AdPrint(("i=%x, lba=%x, len=%x\n",i,lba,lim));
2557 ASSERT(lim);
2558// BrutePoint();
2559 EXTENT_MAP ClrMap[2];
2560 ClrMap[0].extLength = lim & ~(LBS-1);
2561 s = (ExtInfo->Mapping[i-1].extLength - ClrMap[0].extLength) & UDF_EXTENT_LENGTH_MASK;
2562 ClrMap[0].extLocation = ExtInfo->Mapping[i-1].extLocation +
2563 (s >> BSh);
2564 ClrMap[1].extLength =
2565 ClrMap[1].extLocation = 0;
2566 ASSERT((ExtInfo->Mapping[i].extLocation < ClrMap[0].extLocation) ||
2567 (ExtInfo->Mapping[i].extLocation >= (ClrMap[0].extLocation + (ClrMap[0].extLength >> BSh))));
2568 UDFCheckSpaceAllocation(Vcb, 0, (PEXTENT_MAP)(&ClrMap), AS_USED); // check if used
2569 UDFMarkSpaceAsXXX(Vcb, 0, (PEXTENT_MAP)(&ClrMap), AS_DISCARDED); // mark as free
2570 ExtInfo->Mapping[i-1].extLength = s | (flags << 30);
2571 }
2572
2573 s = UDFGetMappingLength(ExtInfo->Mapping);
2574 if(!MyReallocPool__((int8*)(ExtInfo->Mapping), s, (int8**)&(ExtInfo->Mapping), (i+1)*sizeof(EXTENT_MAP))) {
2575 // This must never happen on truncate !!!
2576 AdPrint(("ResizeExtent: MyReallocPool__(8) failed\n"));
2577 }
2578 ExtInfo->Mapping[i].extLength =
2579 ExtInfo->Mapping[i].extLocation = 0;
2580 } else {
2581 AdPrint(("Resize zero (9)\n"));
2582 ASSERT(!ExtInfo->Offset);
2583 UDFMarkSpaceAsXXX(Vcb, 0, ExtInfo->Mapping, AS_DISCARDED); // mark as free
2584 s = UDFGetMappingLength(ExtInfo->Mapping);
2585 if(!MyReallocPool__((int8*)(ExtInfo->Mapping), s, (int8**)&(ExtInfo->Mapping), 2*sizeof(EXTENT_MAP))) {
2586 // This must never happen on truncate !!!
2587 AdPrint(("ResizeExtent: MyReallocPool__(9) failed\n"));
2588 }
2589 ExtInfo->Mapping[0].extLength = LBS | (EXTENT_NOT_RECORDED_NOT_ALLOCATED << 30);
2590 ExtInfo->Mapping[0].extLocation =
2591 ExtInfo->Mapping[1].extLength =
2592 ExtInfo->Mapping[1].extLocation = 0;
2593 }
2594 if(ExtInfo->Offset) {
2595 if(!AlwaysInIcb) {
2596 // remove 1st entry pointing to FileEntry
2597 s = UDFGetMappingLength(ExtInfo->Mapping);
2598 RtlMoveMemory(&(ExtInfo->Mapping[0]), &(ExtInfo->Mapping[1]), s - sizeof(EXTENT_MAP));
2599 if(!MyReallocPool__((int8*)(ExtInfo->Mapping), s,
2600 (int8**)&(ExtInfo->Mapping), s - sizeof(EXTENT_MAP) )) {
2601 // This must never happen on truncate !!!
2602 AdPrint(("ResizeExtent: MyReallocPool__(10) failed\n"));
2603 }
2604 Length -= ExtInfo->Offset;
2605 ExtInfo->Offset = 0;
2606 } else {
2607 Length -= ExtInfo->Offset; // back to in-icb
2608 }
2609 }
2610 ExtInfo->Length = Length;
2611 UDFCheckSpaceAllocation(Vcb, 0, ExtInfo->Mapping, AS_USED); // check if used
2612
2613 for(i=0; (ExtInfo->Mapping[i].extLength & UDF_EXTENT_LENGTH_MASK); i++) {
2614 ExtPrint(("Resized Ext: type %x, loc %x, len %x\n",
2615 ExtInfo->Mapping[i].extLength >> 30, ExtInfo->Mapping[i].extLocation, ExtInfo->Mapping[i].extLength & UDF_EXTENT_LENGTH_MASK));
2616 }
2617
2618 return STATUS_SUCCESS;
2619} // end UDFResizeExtent()
2620
2621/*
2622 This routine (re)builds AllocDescs data for all allocation modes except
2623 in-ICB & resizes associated extent (FileInfo->Dloc->AllocLoc) for
2624 already allocated user data extent (FileInfo->Dloc->DataLoc).
2625 AllocMode in FileEntry pointed by FileInfo must be already initialized.
2626 */
2627OSSTATUS
2628UDFBuildAllocDescs(
2629 IN PVCB Vcb,
2630 IN uint32 PartNum,
2631 IN OUT PUDF_FILE_INFO FileInfo,
2632 OUT int8** AllocData
2633 )
2634{
2635// PEXTENT_MAP InMap;
2636// uint32 i=0;
2637 int8* Allocs;
2638 uint16 AllocMode;
2639 uint32 InitSz;
2640 OSSTATUS status;
2641
2642 ValidateFileInfo(FileInfo);
2643 AdPrint(("BuildAllocDesc\n"));
2644 // get space available in the 1st LBlock after FE
2645 InitSz = Vcb->LBlockSize - FileInfo->Dloc->FileEntryLen;
2646 Allocs = (int8*)MyAllocatePool__(NonPagedPool, InitSz);
2647 if(!Allocs) {
2648 *AllocData = NULL;
2649 AdPrint(("BuildAllocDesc: cant alloc %x bytes for Allocs\n", InitSz));
2650 return STATUS_INSUFFICIENT_RESOURCES;
2651 }
2652 RtlZeroMemory(Allocs, InitSz);
2653// InMap = FileInfo->Dloc->DataLoc.Mapping;
2654 UDFCheckSpaceAllocation(Vcb, 0, InMap, AS_USED); // check if used
2655
2656 // TODO: move data from mapped locations here
2657
2658 AllocMode = ((PFILE_ENTRY)(FileInfo->Dloc->FileEntry))->icbTag.flags & ICB_FLAG_ALLOC_MASK;
2659 switch(AllocMode) {
2660 case ICB_FLAG_AD_IN_ICB: {
2661 MyFreePool__(Allocs);
2662 ASSERT(!FileInfo->Dloc->AllocLoc.Mapping);
2663 Allocs = NULL;
2664 status = STATUS_SUCCESS;
2665 break;
2666 }
2667 case ICB_FLAG_AD_SHORT: {
2668 status = UDFBuildShortAllocDescs(Vcb, PartNum, &Allocs, InitSz, FileInfo);
2669 break;
2670 }
2671 case ICB_FLAG_AD_LONG: {
2672 status = UDFBuildLongAllocDescs(Vcb, PartNum, &Allocs, InitSz, FileInfo);
2673 break;
2674 }
2675/* case ICB_FLAG_AD_EXTENDED: {
2676 status = UDFBuildExtAllocDescs(Vcb, PartNum, &Allocs, InitSz, FileInfo);
2677 break;
2678 }*/
2679 default: {
2680 MyFreePool__(Allocs);
2681 Allocs = NULL;
2682 status = STATUS_INVALID_PARAMETER;
2683 }
2684 }
2685
2686 *AllocData = Allocs;
2687 UDFCheckSpaceAllocation(Vcb, 0, FileInfo->Dloc->DataLoc.Mapping, AS_USED); // check if used
2688
2689 return status;
2690} // end UDFBuildAllocDescs()
2691
2692/*
2693 This routine discards file's allocation
2694 */
2695void
2696UDFFreeFileAllocation(
2697 IN PVCB Vcb,
2698 IN PUDF_FILE_INFO DirInfo,
2699 IN PUDF_FILE_INFO FileInfo
2700 )
2701{
2702 if(FileInfo->Dloc->DataLoc.Offset) {
2703 // in-ICB data
2704 if(FileInfo->Dloc->DataLoc.Mapping) {
2705 ASSERT(FileInfo->Dloc->FELoc.Mapping[0].extLocation ==
2706 FileInfo->Dloc->DataLoc.Mapping[0].extLocation);
2707 UDFMarkSpaceAsXXX(Vcb, FileInfo->Dloc, &(FileInfo->Dloc->DataLoc.Mapping[1]), AS_DISCARDED); // free
2708 FileInfo->Dloc->DataLoc.Mapping[1].extLocation =
2709 FileInfo->Dloc->DataLoc.Mapping[1].extLength = 0;
2710 FileInfo->Dloc->DataLoc.Mapping[0].extLocation = 0;
2711 FileInfo->Dloc->DataLoc.Mapping[0].extLength = EXTENT_NOT_RECORDED_NOT_ALLOCATED << 30;
2712 }
2713 if(FileInfo->Dloc->AllocLoc.Mapping) {
2714 ASSERT(FileInfo->Dloc->FELoc.Mapping[0].extLocation ==
2715 FileInfo->Dloc->AllocLoc.Mapping[0].extLocation);
2716 UDFMarkSpaceAsXXX(Vcb, FileInfo->Dloc, &(FileInfo->Dloc->AllocLoc.Mapping[1]), AS_DISCARDED); // free
2717 FileInfo->Dloc->AllocLoc.Mapping[1].extLocation =
2718 FileInfo->Dloc->AllocLoc.Mapping[1].extLength = 0;
2719 FileInfo->Dloc->AllocLoc.Mapping[0].extLocation = 0;
2720 FileInfo->Dloc->AllocLoc.Mapping[0].extLength = EXTENT_NOT_RECORDED_NOT_ALLOCATED << 30;
2721 }
2722 UDFFreeFESpace(Vcb, DirInfo, &(FileInfo->Dloc->FELoc));
2723 } else {
2724 if(FileInfo->Dloc->AllocLoc.Mapping) {
2725 ASSERT(FileInfo->Dloc->FELoc.Mapping[0].extLocation ==
2726 FileInfo->Dloc->AllocLoc.Mapping[0].extLocation);
2727 UDFMarkSpaceAsXXX(Vcb, FileInfo->Dloc, &(FileInfo->Dloc->AllocLoc.Mapping[1]), AS_DISCARDED); // free
2728 FileInfo->Dloc->AllocLoc.Mapping[1].extLocation =
2729 FileInfo->Dloc->AllocLoc.Mapping[1].extLength = 0;
2730 FileInfo->Dloc->AllocLoc.Mapping[0].extLocation = 0;
2731 FileInfo->Dloc->AllocLoc.Mapping[0].extLength = EXTENT_NOT_RECORDED_NOT_ALLOCATED << 30;
2732 }
2733 UDFFreeFESpace(Vcb, DirInfo, &(FileInfo->Dloc->FELoc));
2734 UDFMarkSpaceAsXXX(Vcb, FileInfo->Dloc, FileInfo->Dloc->DataLoc.Mapping, AS_DISCARDED); // free
2735 }
2736 FileInfo->Dloc->DataLoc.Modified =
2737 FileInfo->Dloc->AllocLoc.Modified =
2738 FileInfo->Dloc->FELoc.Modified = FALSE;
2739} // end UDFFreeFileAllocation()
2740#endif //UDF_READ_ONLY_BUILD
2741
2742/*
2743 This routine packs physically sequential extents into single one
2744 */
2745void
2746__fastcall
2747UDFPackMapping(
2748 IN PVCB Vcb,
2749 IN PEXTENT_INFO ExtInfo // Extent array
2750 )
2751{
2752 PEXTENT_MAP NewMap, OldMap;
2753 uint32 i, j, l;
2754 uint32 LastLba, LastType, OldLen;
2755 uint32 OldSize, NewSize;
2756#ifdef UDF_DBG
2757 int64 check_size;
2758#endif //UDF_DBG
2759
2760 AdPrint(("Pack ExtInfo %x, Mapping %x\n", ExtInfo, ExtInfo->Mapping));
2761 AdPrint((" Length %x\n", ExtInfo->Length));
2762
2763 OldMap = ExtInfo->Mapping;
2764 LastLba = OldMap[0].extLocation;
2765 OldLen = (OldMap[0].extLength & UDF_EXTENT_LENGTH_MASK) >> Vcb->BlockSizeBits;
2766 LastType = OldMap[0].extLength >> 30;
2767 OldSize =
2768 NewSize = UDFGetMappingLength(OldMap);
2769#ifdef UDF_DBG
2770 check_size = UDFGetExtentLength(ExtInfo->Mapping);
2771 ASSERT(!(check_size & (2048-1)));
2772#endif //UDF_DBG
2773
2774 l=OldMap[0].extLength & UDF_EXTENT_LENGTH_MASK;
2775 // calculate required length
2776 for(i=1; OldMap[i].extLength; i++) {
2777 if((LastType == (OldMap[i].extLength >> 30))
2778 &&
2779 ((OldMap[i].extLocation == LastLba + OldLen) ||
2780 (!OldMap[i].extLocation && !LastLba && (LastType == EXTENT_NOT_RECORDED_NOT_ALLOCATED)))
2781 &&
2782 (l + (OldMap[i].extLength & UDF_EXTENT_LENGTH_MASK) <= UDF_MAX_EXTENT_LENGTH)) {
2783 // we can pack two blocks in one
2784 l += OldMap[i].extLength & UDF_EXTENT_LENGTH_MASK;
2785 NewSize -= sizeof(EXTENT_MAP);
2786 } else {
2787 l = OldMap[i].extLength & UDF_EXTENT_LENGTH_MASK;
2788 }
2789 LastLba = OldMap[i].extLocation;
2790 LastType = OldMap[i].extLength >> 30;
2791 OldLen = (OldMap[i].extLength & UDF_EXTENT_LENGTH_MASK) >> Vcb->BlockSizeBits;
2792 }
2793 // no changes ?
2794 if(OldSize <= (NewSize + PACK_MAPPING_THRESHOLD)) {
2795 if(OldSize == NewSize)
2796 return;
2797 if(NewSize >= PACK_MAPPING_THRESHOLD)
2798 return;
2799 }
2800 AdPrint(("Pack ExtInfo %x, Mapping %x, realloc\n", ExtInfo, ExtInfo->Mapping));
2801 NewMap = (PEXTENT_MAP)MyAllocatePoolTag__(NonPagedPool , NewSize,
2802 MEM_EXTMAP_TAG);
2803 // can't alloc ?
2804 if(!NewMap) return;
2805 // Ok, lets pack it...
2806 j=0;
2807 NewMap[0] = OldMap[0];
2808 LastLba = OldMap[0].extLocation;
2809 OldLen = (OldMap[0].extLength & UDF_EXTENT_LENGTH_MASK) >> Vcb->BlockSizeBits;
2810 LastType = OldMap[0].extLength >> 30;
2811 for(i=1; OldMap[i].extLength; i++) {
2812
2813 ExtPrint(("oShExt: type %x, loc %x, len %x\n",
2814 OldMap[i].extLength >> 30, OldMap[i].extLocation, OldMap[i].extLength & UDF_EXTENT_LENGTH_MASK));
2815
2816 if((LastType == (OldMap[i].extLength >> 30))
2817 &&
2818 ((OldMap[i].extLocation == LastLba + OldLen) ||
2819 (!OldMap[i].extLocation && !LastLba && (LastType == EXTENT_NOT_RECORDED_NOT_ALLOCATED)))
2820 &&
2821 ((NewMap[j].extLength & UDF_EXTENT_LENGTH_MASK) + (OldMap[i].extLength & UDF_EXTENT_LENGTH_MASK) <= UDF_MAX_EXTENT_LENGTH)) {
2822 NewMap[j].extLength += OldMap[i].extLength & UDF_EXTENT_LENGTH_MASK;
2823 } else {
2824 j++;
2825 NewMap[j] = OldMap[i];
2826 }
2827
2828 ExtPrint(("nShExt: type %x, loc %x, len %x\n",
2829 NewMap[j].extLength >> 30, NewMap[j].extLocation, NewMap[j].extLength & UDF_EXTENT_LENGTH_MASK));
2830
2831 LastLba = OldMap[i].extLocation;
2832 LastType = OldMap[i].extLength >> 30;
2833 OldLen = (OldMap[i].extLength & UDF_EXTENT_LENGTH_MASK) >> Vcb->BlockSizeBits;
2834 }
2835 // write terminator
2836 j++;
2837 ASSERT(NewSize == (j+1)*sizeof(EXTENT_MAP));
2838 NewMap[j].extLength =
2839 NewMap[j].extLocation = 0;
2840
2841#ifdef UDF_DBG
2842 ASSERT(check_size == UDFGetExtentLength(ExtInfo->Mapping));
2843 ASSERT(check_size == UDFGetExtentLength(NewMap));
2844#endif
2845
2846 AdPrint(("Pack ExtInfo %x, NewMap %x, OldMap %x\n", ExtInfo, NewMap, OldMap));
2847
2848 ExtInfo->Mapping = NewMap;
2849 MyFreePool__(OldMap);
2850
2851 AdPrint(("Pack ExtInfo %x, Mapping %x\n", ExtInfo, ExtInfo->Mapping));
2852 AdPrint((" Length %x\n", ExtInfo->Length));
2853} // end UDFPackMapping()
2854
2855/*
2856 This routine expands mapping to 'frag-per-LBlock' state
2857 */
2858OSSTATUS
2859__fastcall
2860UDFUnPackMapping(
2861 IN PVCB Vcb,
2862 IN PEXTENT_INFO ExtInfo // Extent array
2863 )
2864{
2865 PEXTENT_MAP NewMapping;
2866 PEXTENT_MAP Mapping = ExtInfo->Mapping;
2867 uint32 LBS = Vcb->LBlockSize;
2868 uint32 len = (uint32)(UDFGetExtentLength(Mapping) >> Vcb->LBlockSizeBits);
2869 uint32 i,j, type, base, d;
2870 LONG l;
2871
2872 NewMapping = (PEXTENT_MAP)MyAllocatePoolTag__(NonPagedPool , (len+1)*sizeof(EXTENT_MAP),
2873 MEM_EXTMAP_TAG);
2874 if(!NewMapping) return STATUS_INSUFFICIENT_RESOURCES;
2875
2876 j=0;
2877 d = LBS >> Vcb->BlockSizeBits;
2878 for(i=0; (l = (Mapping[i].extLength & UDF_EXTENT_LENGTH_MASK)); i++) {
2879 base = Mapping[i].extLocation;
2880 type = Mapping[i].extLength & UDF_EXTENT_FLAG_MASK;
2881 for(; l>=(LONG)LBS; j++) {
2882 NewMapping[j].extLength = LBS | type;
2883 NewMapping[j].extLocation = base;
2884 base+=d;
2885 l-=LBS;
2886 }
2887 }
2888 // record terminator
2889 ASSERT(NewMapping);
2890 RtlZeroMemory(&(NewMapping[j]), sizeof(EXTENT_MAP));
2891 MyFreePool__(Mapping);
2892 ExtInfo->Mapping = NewMapping;
2893
2894 return STATUS_SUCCESS;
2895} // end UDFUnPackMapping()
2896
2897/*
2898 Relocate a part of extent that starts from relative (inside extent)
2899 block number 'ExtBlock' and has length of 'BC' blocks to continuous
2900 run which starts at block 'Lba'
2901 */
2902OSSTATUS
2903UDFRelocateExtent(
2904 IN PVCB Vcb,
2905 IN PEXTENT_INFO ExtInfo,
2906 IN uint32 ExtBlock,
2907 IN uint32 Lba,
2908 IN uint32 BC
2909 )
2910{
2911 return STATUS_ACCESS_DENIED;
2912}
2913
2914/*
2915 This routine checks if all the data required is in cache.
2916 */
2917BOOLEAN
2918UDFIsExtentCached(
2919 IN PVCB Vcb,
2920 IN PEXTENT_INFO ExtInfo, // Extent array
2921 IN int64 Offset, // offset in extent
2922 IN uint32 Length,
2923 IN BOOLEAN ForWrite
2924 )
2925{
2926 BOOLEAN retstat = FALSE;
2927 PEXTENT_MAP Extent = ExtInfo->Mapping; // Extent array
2928 SIZE_T to_read;
2929 uint32 Lba, sect_offs, flags, i;
2930
2931 WCacheStartDirect__(&(Vcb->FastCache), Vcb, TRUE/*FALSE*//*ForWrite*/);
2932 if(!ExtInfo || !ExtInfo->Mapping) goto EO_IsCached;
2933 if(!Length) {
2934 retstat = TRUE;
2935 goto EO_IsCached;
2936 }
2937
2938 // prevent reading out of data space
2939 if(Offset > ExtInfo->Length) goto EO_IsCached;
2940 if(Offset+Length > ExtInfo->Length) goto EO_IsCached;
2941 Offset += ExtInfo->Offset; // used for in-ICB data
2942 // read maximal possible part of each frag of extent
2943 Lba = UDFExtentOffsetToLba(Vcb, Extent, Offset, &sect_offs, &to_read, &flags, &i);
2944 while(((LONG)Length) > 0) {
2945 // EOF check
2946 if(Lba == LBA_OUT_OF_EXTENT) goto EO_IsCached;
2947 Extent += (i + 1);
2948 // check for reading tail
2949 to_read = min(to_read, Length);
2950 if(flags == EXTENT_RECORDED_ALLOCATED) {
2951 retstat = UDFIsDataCached(Vcb, Lba, (to_read+sect_offs+Vcb->BlockSize-1)>>Vcb->BlockSizeBits);
2952 if(!retstat) goto EO_IsCached;
2953 } else if(ForWrite) {
2954 goto EO_IsCached;
2955 }
2956 Offset += to_read;
2957 Length -= to_read;
2958 Lba = UDFNextExtentToLba(Vcb, Extent, &to_read, &flags, &i);
2959 }
2960 retstat = TRUE;
2961EO_IsCached:
2962 if(!retstat) {
2963 WCacheEODirect__(&(Vcb->FastCache), Vcb);
2964 }
2965 return retstat;
2966} // end UDFIsExtentCached()
2967
2968/*
2969 This routine reads cached data only.
2970 */
2971/*OSSTATUS
2972UDFReadExtentCached(
2973 IN PVCB Vcb,
2974 IN PEXTENT_INFO ExtInfo, // Extent array
2975 IN int64 Offset, // offset in extent
2976 IN uint32 Length,
2977 OUT int8* Buffer,
2978 OUT PSIZE_T ReadBytes
2979 )
2980{
2981 (*ReadBytes) = 0;
2982 if(!ExtInfo || !ExtInfo->Mapping) return STATUS_INVALID_PARAMETER;
2983
2984 PEXTENT_MAP Extent = ExtInfo->Mapping; // Extent array
2985 uint32 to_read, Lba, sect_offs, flags;
2986 SIZE_T _ReadBytes;
2987 OSSTATUS status;
2988 // prevent reading out of data space
2989 if(Offset > ExtInfo->Length) return STATUS_END_OF_FILE;
2990 if(Offset+Length > ExtInfo->Length) Length = (uint32)(ExtInfo->Length - Offset);
2991 Offset += ExtInfo->Offset; // used for in-ICB data
2992 // read maximal possible part of each frag of extent
2993 while(((LONG)Length) > 0) {
2994 Lba = UDFExtentOffsetToLba(Vcb, Extent, Offset, &sect_offs, &to_read, &flags, NULL);
2995 // EOF check
2996 if(Lba == LBA_OUT_OF_EXTENT) return STATUS_END_OF_FILE;
2997 // check for reading tail
2998 to_read = (to_read < Length) ?
2999 to_read : Length;
3000 if(flags == EXTENT_RECORDED_ALLOCATED) {
3001 status = UDFReadDataCached(Vcb, TRUE, ( ((uint64)Lba) << Vcb->BlockSizeBits) + sect_offs, to_read, Buffer, &_ReadBytes);
3002 (*ReadBytes) += _ReadBytes;
3003 } else {
3004 RtlZeroMemory(Buffer, to_read);
3005 (*ReadBytes) += to_read;
3006 status = STATUS_SUCCESS;
3007 }
3008 if(!OS_SUCCESS(status)) return status;
3009 // prepare for reading next frag...
3010 Buffer += to_read;
3011 Offset += to_read;
3012 Length -= to_read;
3013 }
3014 return STATUS_SUCCESS;
3015} // end UDFReadExtentCached()*/
3016
3017/*
3018 This routine reads data at any offset from specified extent.
3019 */
3020OSSTATUS
3021UDFReadExtent(
3022 IN PVCB Vcb,
3023 IN PEXTENT_INFO ExtInfo, // Extent array
3024 IN int64 Offset, // offset in extent
3025 IN SIZE_T Length,
3026 IN BOOLEAN Direct,
3027 OUT int8* Buffer,
3028 OUT PSIZE_T ReadBytes
3029 )
3030{
3031 (*ReadBytes) = 0;
3032 if(!ExtInfo || !ExtInfo->Mapping) return STATUS_INVALID_PARAMETER;
3033 ASSERT((uintptr_t)Buffer > 0x1000);
3034
3035 AdPrint(("Read ExtInfo %x, Mapping %x\n", ExtInfo, ExtInfo->Mapping));
3036
3037 PEXTENT_MAP Extent = ExtInfo->Mapping; // Extent array
3038 SIZE_T to_read, _ReadBytes;
3039 uint32 Lba, sect_offs, flags;
3040 uint32 index;
3041 OSSTATUS status;
3042 // prevent reading out of data space
3043 if(Offset > ExtInfo->Length) return STATUS_END_OF_FILE;
3044 if(Offset+Length > ExtInfo->Length) Length = (uint32)(ExtInfo->Length - Offset);
3045 Offset += ExtInfo->Offset; // used for in-ICB data
3046 // read maximal possible part of each frag of extent
3047 Lba = UDFExtentOffsetToLba(Vcb, Extent, Offset, &sect_offs, &to_read, &flags, &index);
3048 _ReadBytes = index;
3049 while(Length) {
3050 // EOF check
3051 if(Lba == LBA_OUT_OF_EXTENT) return STATUS_END_OF_FILE;
3052 Extent += (_ReadBytes + 1);
3053 // check for reading tail
3054 to_read = min(to_read, Length);
3055 if(flags == EXTENT_RECORDED_ALLOCATED) {
3056 status = UDFReadData(Vcb, TRUE, ( ((uint64)Lba) << Vcb->BlockSizeBits) + sect_offs, to_read, Direct, Buffer, &_ReadBytes);
3057 (*ReadBytes) += _ReadBytes;
3058 if(!OS_SUCCESS(status)) return status;
3059 } else {
3060 RtlZeroMemory(Buffer, to_read);
3061 (*ReadBytes) += to_read;
3062 }
3063 // prepare for reading next frag...
3064 Length -= to_read;
3065 if(!Length)
3066 break;
3067 ASSERT(to_read);
3068 Buffer += to_read;
3069// Offset += to_read;
3070 Lba = UDFNextExtentToLba(Vcb, Extent, &to_read, &flags, &index);
3071 _ReadBytes = index;
3072 sect_offs = 0;
3073 }
3074 return STATUS_SUCCESS;
3075} // end UDFReadExtent()
3076
3077/*
3078 This routine reads and builds mapping for
3079 specified amount of data at any offset from specified extent.
3080 Size of output buffer is limited by *_SubExtInfoSz
3081 */
3082OSSTATUS
3083UDFReadExtentLocation(
3084 IN PVCB Vcb,
3085 IN PEXTENT_INFO ExtInfo, // Extent array
3086 IN int64 Offset, // offset in extent to start SubExtent from
3087 OUT PEXTENT_MAP* _SubExtInfo, // SubExtent mapping array
3088 IN OUT uint32* _SubExtInfoSz, // IN: maximum number of fragments to get
3089 // OUT: actually obtained fragments
3090 OUT int64* _NextOffset // offset, caller can start from to continue
3091 )
3092{
3093 if(!ExtInfo || !ExtInfo->Mapping)
3094 return STATUS_INVALID_PARAMETER;
3095
3096 PEXTENT_MAP Extent = ExtInfo->Mapping; // Extent array
3097 PEXTENT_MAP SubExtInfo;
3098 SIZE_T to_read;
3099 uint32 Lba, sect_offs, flags, Skip_MapEntries;
3100 int32 SubExtInfoSz = *_SubExtInfoSz;
3101 int64 Length;
3102 int64 NextOffset;
3103// OSSTATUS status = STATUS_BUFFER_OVERFLOW;
3104
3105 (*_SubExtInfo) = NULL;
3106 (*_SubExtInfoSz) = 0;
3107 NextOffset = Offset;
3108 // prevent reading out of data space
3109 if(Offset >= ExtInfo->Length)
3110 return STATUS_END_OF_FILE;
3111 Length = ExtInfo->Length - Offset;
3112 Offset += ExtInfo->Offset; // used for in-ICB data
3113 // read maximal possible part of each frag of extent
3114 SubExtInfo = (PEXTENT_MAP)MyAllocatePoolTag__(NonPagedPool , SubExtInfoSz*sizeof(EXTENT_MAP),
3115 MEM_EXTMAP_TAG);
3116 (*_SubExtInfo) = SubExtInfo;
3117 if(!SubExtInfo)
3118 return STATUS_INSUFFICIENT_RESOURCES;
3119
3120 Lba = UDFExtentOffsetToLba(Vcb, Extent, Offset, &sect_offs, &to_read, &flags, &Skip_MapEntries);
3121 while(Length && SubExtInfoSz) {
3122 // EOF check
3123 if(Lba == LBA_OUT_OF_EXTENT) {
3124 BrutePoint();
3125 return STATUS_END_OF_FILE;
3126 }
3127 Extent += (Skip_MapEntries + 1);
3128 // check for reading tail
3129 to_read = (int32)min((int64)to_read, Length);
3130 SubExtInfo->extLength = to_read;
3131 if(flags == EXTENT_NOT_RECORDED_NOT_ALLOCATED) {
3132 SubExtInfo->extLocation = LBA_NOT_ALLOCATED;
3133 } else
3134 if(flags == EXTENT_NOT_RECORDED_ALLOCATED) {
3135 ASSERT(!(Lba & 0x80000000));
3136 SubExtInfo->extLocation = Lba | 0x80000000;
3137 } else {
3138 SubExtInfo->extLocation = Lba;
3139 }
3140 (*_SubExtInfoSz)++;
3141 SubExtInfoSz--;
3142 NextOffset += to_read;
3143 // prepare for reading next frag...
3144 Length -= to_read;
3145 if(!Length) {
3146// status = STATUS_SUCCESS;
3147 break;
3148 }
3149 ASSERT(to_read);
3150 Lba = UDFNextExtentToLba(Vcb, Extent, &to_read, &flags, &Skip_MapEntries);
3151 sect_offs = 0;
3152 }
3153 (*_NextOffset) = NextOffset;
3154 return STATUS_SUCCESS;
3155} // end UDFReadExtentLocation()
3156
3157#ifdef _MSC_VER
3158#pragma warning(push)
3159#pragma warning(disable:4035) // re-enable below
3160#endif
3161
3162uint32
3163UDFGetZeroLength(
3164 IN int8* Buffer,
3165 IN uint32 Length
3166 )
3167{
3168 uint32 i;
3169 Length /= sizeof(uint32);
3170 for(i=0; i<Length; i++) {
3171 if( ((uint32*)Buffer)[i] )
3172 break;
3173 }
3174 return Length*sizeof(uint32);
3175}
3176
3177#ifdef _MSC_VER
3178#pragma warning(pop) // re-enable warning #4035
3179#endif
3180
3181#ifndef UDF_READ_ONLY_BUILD
3182/*
3183 This routine writes data at any offset to specified extent.
3184 */
3185OSSTATUS
3186UDFWriteExtent(
3187 IN PVCB Vcb,
3188 IN PEXTENT_INFO ExtInfo, // Extent array
3189 IN int64 Offset, // offset in extent
3190 IN SIZE_T Length,
3191 IN BOOLEAN Direct, // setting this flag delays flushing of given
3192 // data to indefinite term
3193 IN int8* Buffer,
3194 OUT PSIZE_T WrittenBytes
3195 )
3196{
3197 if(!ExtInfo || !ExtInfo->Mapping)
3198 return STATUS_INVALID_PARAMETER;
3199
3200 PEXTENT_MAP Extent = ExtInfo->Mapping; // Extent array
3201 uint32 Lba, sect_offs, flags;
3202 OSSTATUS status;
3203 SIZE_T to_write, _WrittenBytes;
3204 BOOLEAN reread_lba;
3205// BOOLEAN already_prepared = FALSE;
3206// BOOLEAN prepare = !Buffer;
3207
3208 AdPrint(("Write ExtInfo %x, Mapping %x\n", ExtInfo, ExtInfo->Mapping));
3209
3210 Offset += ExtInfo->Offset; // used for in-ICB data
3211 // write maximal possible part of each frag of extent
3212 while(((LONG)Length) > 0) {
3213 UDFCheckSpaceAllocation(Vcb, 0, Extent, AS_USED); // check if used
3214 Lba = UDFExtentOffsetToLba(Vcb, Extent, Offset, &sect_offs, &to_write, &flags, NULL);
3215 // EOF check
3216 if(Lba == LBA_OUT_OF_EXTENT) {
3217 return STATUS_END_OF_FILE;
3218 }
3219/* if((to_write < Length) &&
3220 !Direct && !prepare && !already_prepared) {
3221 // rebuild mapping, allocate space, etc.
3222 // to indicate this, set Buffer to NULL
3223 AdPrint(("UDFWriteExtent: Prepare\n"));
3224 BrutePoint();
3225 _WrittenBytes = 0;
3226 status = UDFWriteExtent(Vcb, ExtInfo, Offset, Length, *//*Direct*//*FALSE, NULL, &_WrittenBytes);
3227 if(!OS_SUCCESS(status)) {
3228 return status;
3229 }
3230 Extent = ExtInfo->Mapping;
3231 Lba = UDFExtentOffsetToLba(Vcb, Extent, Offset, &sect_offs, &to_write, &flags, NULL);
3232 already_prepared = TRUE;
3233 }*/
3234 if(flags == EXTENT_NOT_RECORDED_NOT_ALLOCATED) {
3235 // here we should allocate space for this extent
3236 if(!OS_SUCCESS(status = UDFMarkNotAllocatedAsAllocated(Vcb, Offset, to_write, ExtInfo)))
3237 return status;
3238 Extent = ExtInfo->Mapping;
3239 UDFCheckSpaceAllocation(Vcb, 0, Extent, AS_USED); // check if used
3240 Lba = UDFExtentOffsetToLba(Vcb, Extent, Offset, &sect_offs, &to_write, &flags, NULL);
3241 if(Lba == LBA_OUT_OF_EXTENT) {
3242 return STATUS_END_OF_FILE;
3243 }
3244 // we have already re-read Lba
3245 reread_lba = FALSE;
3246 } else {
3247 // we may need to re-read Lba if some changes are
3248 // made while converting from Alloc-Not-Rec
3249 reread_lba = TRUE;
3250 }
3251 // check if writing to not recorded allocated
3252 // in this case we must pad blocks with zeros around
3253 // modified area
3254 //
3255 // ...|xxxxxxxx|xxxxxxxx|xxxxxxxx|...
3256 // . .
3257 // . || .
3258 // . \/ .
3259 // . .
3260 // ...|000ddddd|dddddddd|dd000000|...
3261 // . .
3262 // ^ ^
3263 // sect_offs sect_offs+to_write
3264 // . .
3265 // .<-- to_write -->.
3266 //
3267 to_write = min(to_write, Length);
3268 if(flags == EXTENT_NOT_RECORDED_ALLOCATED) {
3269 if(!OS_SUCCESS(status = UDFMarkAllocatedAsRecorded(Vcb, Offset, to_write, ExtInfo)))
3270 return status;
3271 Extent = ExtInfo->Mapping;
3272 UDFCheckSpaceAllocation(Vcb, 0, Extent, AS_USED); // check if used
3273 if(reread_lba) {
3274 Lba = UDFExtentOffsetToLba(Vcb, Extent, Offset, &sect_offs, &to_write, &flags, NULL);
3275 to_write = min(to_write, Length);
3276 }
3277 /*
3278 we must fill 1st block with zeros in 1 of 2 cases:
3279 1) start offset is not aligned on LBlock boundary
3280 OR
3281 2) end offset is not aligned on LBlock boundary and lays in
3282 the same LBlock
3283
3284 we must fill last block with zeros if both
3285 1) end offset is not aligned on LBlock boundary
3286 AND
3287 2) end offset DOESN'T lay in the 1st LBlock
3288 */
3289
3290// if(!prepare) {
3291 // pad 1st logical block
3292 if((sect_offs || (sect_offs + to_write < Vcb->LBlockSize) )
3293 &&
3294 !Vcb->CDR_Mode) {
3295 status = UDFWriteData(Vcb, TRUE,
3296 ( ((uint64)Lba) << Vcb->BlockSizeBits),
3297 Vcb->LBlockSize, Direct, Vcb->ZBuffer, &_WrittenBytes);
3298 if(!OS_SUCCESS(status))
3299 return status;
3300 }
3301 // pad last logical block
3302 if((sect_offs + to_write > Vcb->LBlockSize) &&
3303 (sect_offs + to_write) & (Vcb->LBlockSize - 1)) {
3304 status = UDFWriteData(Vcb, TRUE,
3305 (( ((uint64)Lba) << Vcb->BlockSizeBits) + sect_offs + to_write) & ~((int64)(Vcb->LBlockSize)-1),
3306 Vcb->LBlockSize, Direct, Vcb->ZBuffer, &_WrittenBytes);
3307 }
3308 if(!OS_SUCCESS(status))
3309 return status;
3310/* } else {
3311 status = STATUS_SUCCESS;
3312 }*/
3313 }
3314 ASSERT(to_write);
3315// if(!prepare) {
3316 status = UDFWriteData(Vcb, TRUE, ( ((uint64)Lba) << Vcb->BlockSizeBits) + sect_offs, to_write, Direct, Buffer, &_WrittenBytes);
3317 *WrittenBytes += _WrittenBytes;
3318 if(!OS_SUCCESS(status)) return status;
3319/* } else {
3320 status = STATUS_SUCCESS;
3321 *WrittenBytes += to_write;
3322 }*/
3323 // prepare for writing next frag...
3324 Buffer += to_write;
3325 Offset += to_write;
3326 Length -= to_write;
3327 }
3328 AdPrint(("Write: ExtInfo %x, Mapping %x\n", ExtInfo, ExtInfo->Mapping));
3329 return STATUS_SUCCESS;
3330} // end UDFWriteExtent()
3331
3332//#if 0
3333/*
3334 This routine zeroes/deallocates data at any offset to specified extent.
3335 */
3336OSSTATUS
3337UDFZeroExtent(
3338 IN PVCB Vcb,
3339 IN PEXTENT_INFO ExtInfo, // Extent array
3340 IN int64 Offset, // offset in extent
3341 IN SIZE_T Length,
3342 IN BOOLEAN Deallocate, // deallocate frag or just mark as unrecorded
3343 IN BOOLEAN Direct, // setting this flag delays flushing of given
3344 // data to indefinite term
3345 OUT PSIZE_T WrittenBytes
3346 )
3347{
3348 if(!ExtInfo || !ExtInfo->Mapping)
3349 return STATUS_INVALID_PARAMETER;
3350
3351 PEXTENT_MAP Extent = ExtInfo->Mapping; // Extent array
3352 uint32 Lba, sect_offs, flags;
3353 OSSTATUS status;
3354 SIZE_T to_write, _WrittenBytes;
3355 SIZE_T LBS = Vcb->LBlockSize;
3356
3357 AdPrint(("Zero ExtInfo %x, Mapping %x\n", ExtInfo, ExtInfo->Mapping));
3358
3359 Offset += ExtInfo->Offset; // used for in-ICB data
3360 // fill/deallocate maximal possible part of each frag of extent
3361 while(((LONG)Length) > 0) {
3362 Lba = UDFExtentOffsetToLba(Vcb, Extent, Offset, &sect_offs, &to_write, &flags, NULL);
3363 // EOF check
3364 if(Lba == LBA_OUT_OF_EXTENT) {
3365 return STATUS_END_OF_FILE;
3366 }
3367 // check for writing tail
3368 to_write = min(to_write, Length);
3369
3370 if(flags == EXTENT_NOT_RECORDED_NOT_ALLOCATED) {
3371 // here we should do nothing
3372 *WrittenBytes += to_write;
3373 } else
3374 if(flags == EXTENT_NOT_RECORDED_ALLOCATED) {
3375 // we should just deallocate this frag
3376 if(Deallocate) {
3377 if(!OS_SUCCESS(status = UDFMarkAllocatedAsNotAllocated(Vcb, Offset, to_write, ExtInfo)))
3378 return status;
3379 }
3380 Extent = ExtInfo->Mapping;
3381 *WrittenBytes += to_write;
3382 } else {
3383 // fill tail of the 1st Block with ZEROs
3384 if(sect_offs) {
3385 status = UDFWriteData(Vcb, TRUE, ( ((uint64)Lba) << Vcb->BlockSizeBits) + sect_offs,
3386 min(to_write, LBS-sect_offs),
3387 Direct, Vcb->ZBuffer, &_WrittenBytes);
3388 *WrittenBytes += _WrittenBytes;
3389 if(!OS_SUCCESS(status))
3390 return status;
3391 Offset += _WrittenBytes;
3392 Length -= _WrittenBytes;
3393 to_write -= _WrittenBytes;
3394 Lba = UDFExtentOffsetToLba(Vcb, Extent, Offset, &sect_offs, &to_write, &flags, NULL);
3395 ASSERT(flags != EXTENT_NOT_RECORDED_NOT_ALLOCATED);
3396 ASSERT(flags != EXTENT_NOT_RECORDED_ALLOCATED);
3397 ASSERT(!sect_offs);
3398 }
3399 // deallocate Blocks
3400 if(to_write >= LBS) {
3401 // use 'sect_offs' as length of extent to be deallocated
3402 sect_offs = to_write & ~(LBS - 1);
3403 if(Deallocate) {
3404 status = UDFMarkAllocatedAsNotAllocated(Vcb, Offset, sect_offs, ExtInfo);
3405 } else {
3406 status = UDFMarkRecordedAsAllocated(Vcb, Offset, sect_offs, ExtInfo);
3407 }
3408 if(!OS_SUCCESS(status))
3409 return status;
3410 // reload extent mapping
3411 Extent = ExtInfo->Mapping;
3412 Offset += sect_offs;
3413 Length -= sect_offs;
3414 *WrittenBytes += sect_offs;
3415 to_write -= sect_offs;
3416 Lba = UDFExtentOffsetToLba(Vcb, Extent, Offset, &sect_offs, &to_write, &flags, NULL);
3417 ASSERT(flags != EXTENT_NOT_RECORDED_NOT_ALLOCATED);
3418 ASSERT(flags != EXTENT_NOT_RECORDED_ALLOCATED);
3419 ASSERT(!sect_offs);
3420 }
3421 // fill beginning of the last Block with ZEROs
3422 if(to_write) {
3423 status = UDFWriteData(Vcb, TRUE, ( ((uint64)Lba) << Vcb->BlockSizeBits), to_write, Direct, Vcb->ZBuffer, &_WrittenBytes);
3424 *WrittenBytes += _WrittenBytes;
3425 if(!OS_SUCCESS(status))
3426 return status;
3427 ASSERT(to_write == _WrittenBytes);
3428 }
3429 }
3430 AdPrint(("Zero... ExtInfo %x, Mapping %x\n", ExtInfo, ExtInfo->Mapping));
3431 // prepare for filling next frag...
3432 Offset += to_write;
3433 Length -= to_write;
3434 }
3435 AdPrint(("Zero: ExtInfo %x, Mapping %x\n", ExtInfo, ExtInfo->Mapping));
3436 return STATUS_SUCCESS;
3437} // end UDFZeroExtent()
3438//#endif //0
3439#endif //UDF_READ_ONLY_BUILD
BOOLEAN
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Definition: ProcessorBind.h:185
UDFPartEnd
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Definition: alloc.cpp:242
UDFPartStart
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Definition: alloc.cpp:222
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Definition: alloc.cpp:46
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Definition: types.h:30
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Definition: types.h:32
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Definition: various.h:29
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Definition: main.c:63
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Definition: cdprocs.h:1622
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Definition: crypt_des.c:251
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Definition: deflate.h:82
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Definition: types.h:112
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Definition: types.h:120
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Definition: types.h:117
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Definition: platform.h:18
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Definition: platform.h:12
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Definition: platform.h:20
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Definition: platform.h:10
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Definition: platform.h:13
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Definition: detect.c:67
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Definition: ecma_167.h:135
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Definition: ecma_167.h:368
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Definition: ecma_167.h:494
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Definition: ecma_167.h:379
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Definition: ecma_167.h:175
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Definition: ecma_167.h:493
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Definition: ecma_167.h:369
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Definition: ecma_167.h:370
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Definition: ecma_167.h:367
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Definition: ecma_167.h:170
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Definition: ecma_167.h:380
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Definition: ecma_167.h:167
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Definition: ecma_167.h:496
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Definition: ecma_167.h:480
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Definition: ecma_167.h:134
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Definition: env_spec_w32.h:294
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Definition: extent.cpp:2903
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Definition: extent.cpp:1948
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Definition: extent.cpp:1329
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Definition: extent.cpp:79
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Definition: extent.cpp:595
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Definition: extent.cpp:3083
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Definition: extent.cpp:189
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Definition: extent.cpp:1563
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Definition: extent.cpp:1776
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Definition: extent.cpp:3163
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Definition: extent.cpp:825
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Definition: extent.cpp:2918
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Definition: extent.cpp:266
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Definition: extent.cpp:116
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Definition: extent.cpp:1012
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Definition: extent.cpp:1417
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Definition: fltkernel.h:975
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Definition: gl.h:1545
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Definition: gl.h:2039
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Definition: glext.h:6340
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Definition: glext.h:6031
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Definition: glext.h:7161
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Definition: glext.h:6722
i
GLsizei GLenum const GLvoid GLsizei GLenum GLbyte GLbyte GLbyte GLdouble GLdouble GLdouble GLfloat GLfloat GLfloat GLint GLint GLint GLshort GLshort GLshort GLubyte GLubyte GLubyte GLuint GLuint GLuint GLushort GLushort GLushort GLbyte GLbyte GLbyte GLbyte GLdouble GLdouble GLdouble GLdouble GLfloat GLfloat GLfloat GLfloat GLint GLint GLint GLint GLshort GLshort GLshort GLshort GLubyte GLubyte GLubyte GLubyte GLuint GLuint GLuint GLuint GLushort GLushort GLushort GLushort GLboolean const GLdouble const GLfloat const GLint const GLshort const GLbyte const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLdouble const GLfloat const GLfloat const GLint const GLint const GLshort const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort GLenum GLenum GLenum GLfloat GLenum GLint GLenum GLenum GLenum GLfloat GLenum GLenum GLint GLenum GLfloat GLenum GLint GLint GLushort GLenum GLenum GLfloat GLenum GLenum GLint GLfloat const GLubyte GLenum GLenum GLenum const GLfloat GLenum GLenum const GLint GLenum GLint GLint GLsizei GLsizei GLint GLenum GLenum const GLvoid GLenum GLenum const GLfloat GLenum GLenum const GLint GLenum GLenum const GLdouble GLenum GLenum const GLfloat GLenum GLenum const GLint GLsizei GLuint GLfloat GLuint GLbitfield GLfloat GLint GLuint GLboolean GLenum GLfloat GLenum GLbitfield GLenum GLfloat GLfloat GLint GLint const GLfloat GLenum GLfloat GLfloat GLint GLint GLfloat GLfloat GLint GLint const GLfloat GLint GLfloat GLfloat GLint GLfloat GLfloat GLint GLfloat GLfloat const GLdouble const GLfloat const GLdouble const GLfloat GLint i
Definition: glfuncs.h:248
j
GLsizei GLenum const GLvoid GLsizei GLenum GLbyte GLbyte GLbyte GLdouble GLdouble GLdouble GLfloat GLfloat GLfloat GLint GLint GLint GLshort GLshort GLshort GLubyte GLubyte GLubyte GLuint GLuint GLuint GLushort GLushort GLushort GLbyte GLbyte GLbyte GLbyte GLdouble GLdouble GLdouble GLdouble GLfloat GLfloat GLfloat GLfloat GLint GLint GLint GLint GLshort GLshort GLshort GLshort GLubyte GLubyte GLubyte GLubyte GLuint GLuint GLuint GLuint GLushort GLushort GLushort GLushort GLboolean const GLdouble const GLfloat const GLint const GLshort const GLbyte const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLdouble const GLfloat const GLfloat const GLint const GLint const GLshort const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort GLenum GLenum GLenum GLfloat GLenum GLint GLenum GLenum GLenum GLfloat GLenum GLenum GLint GLenum GLfloat GLenum GLint GLint GLushort GLenum GLenum GLfloat GLenum GLenum GLint GLfloat const GLubyte GLenum GLenum GLenum const GLfloat GLenum GLenum const GLint GLenum GLint GLint GLsizei GLsizei GLint GLenum GLenum const GLvoid GLenum GLenum const GLfloat GLenum GLenum const GLint GLenum GLenum const GLdouble GLenum GLenum const GLfloat GLenum GLenum const GLint GLsizei GLuint GLfloat GLuint GLbitfield GLfloat GLint GLuint GLboolean GLenum GLfloat GLenum GLbitfield GLenum GLfloat GLfloat GLint GLint const GLfloat GLenum GLfloat GLfloat GLint GLint GLfloat GLfloat GLint GLint const GLfloat GLint GLfloat GLfloat GLint GLfloat GLfloat GLint GLfloat GLfloat const GLdouble const GLfloat const GLdouble const GLfloat GLint GLint GLint j
Definition: glfuncs.h:250
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@ PS
Definition: i386-stub-win32.c:126
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Definition: ke_i.h:81
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Definition: mem_tools.h:149
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Definition: mem_tools.h:152
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Definition: mem_tools.h:230
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#define UDF_EXTENT_FLAG_MASK
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Definition: osta_misc.h:148
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Definition: pedump.c:60
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Definition: cdprocs.h:1415
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Definition: phys_lib.cpp:4141
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Definition: ecma_167.h:128
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Definition: ecma_167.h:129
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Definition: udf_rel.h:66
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Definition: udf_rel.h:67
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Definition: udf_rel.h:65
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Definition: synth_sse3d.h:85
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Definition: typedefs.h:263
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Definition: typedefs.h:262
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Definition: typedefs.h:40
UDF_VCB_IC_W2K_COMPAT_ALLOC_DESCS
#define UDF_VCB_IC_W2K_COMPAT_ALLOC_DESCS
Definition: udf_common.h:501
UDFSetUpTag
void UDFSetUpTag(IN PVCB Vcb, IN tag *Tag, IN uint16 DataLen, IN uint32 TagLoc)
Definition: udf_info.cpp:936
lba
#define lba
AS_USED
#define AS_USED
Definition: udf_info.h:327
UDFAllocFreeExtent
#define UDFAllocFreeExtent(v, l, ss, sl, e, af)
Definition: udf_info.h:347
UDFMarkSpaceAsXXXNoProtect
#define UDFMarkSpaceAsXXXNoProtect(Vcb, FileInfo, Map, asXXX)
Definition: udf_info.h:302
UDFMarkAllocatedAsNotAllocated
#define UDFMarkAllocatedAsNotAllocated(Vcb, Off, Len, Ext)
Definition: udf_info.h:503
UDFExtentToMapping
#define UDFExtentToMapping(e)
Definition: udf_info.h:181
UDF_PREALLOC_CLASS_DIR
#define UDF_PREALLOC_CLASS_DIR
Definition: udf_info.h:356
UDF_PREALLOC_CLASS_FE
#define UDF_PREALLOC_CLASS_FE
Definition: udf_info.h:355
UDFGetFreeBit
#define UDFGetFreeBit(arr, bit)
Definition: udf_info.h:1199
UDFMarkRecordedAsAllocated
#define UDFMarkRecordedAsAllocated(Vcb, Off, Len, Ext)
Definition: udf_info.h:516
UDFGetBadBit
#define UDFGetBadBit(arr, bit)
Definition: udf_info.h:1205
UDFCheckSpaceAllocation
#define UDFCheckSpaceAllocation(Vcb, FileInfo, Map, asXXX)
Definition: udf_info.h:281
AS_DISCARDED
#define AS_DISCARDED
Definition: udf_info.h:328
UDFMarkSpaceAsXXX
#define UDFMarkSpaceAsXXX(Vcb, FileInfo, Map, asXXX)
Definition: udf_info.h:322
ALLOC_DESC_MAX_RECURSE
#define ALLOC_DESC_MAX_RECURSE
Definition: udf_rel.h:120
EXTENT_FLAG_2K_COMPAT
#define EXTENT_FLAG_2K_COMPAT
Definition: udf_rel.h:82
LBA_NOT_ALLOCATED
#define LBA_NOT_ALLOCATED
Definition: udf_rel.h:427
MEM_ALLOCDESC_TAG
#define MEM_ALLOCDESC_TAG
Definition: udf_rel.h:493
EXTENT_FLAG_CUT_PREALLOCATED
#define EXTENT_FLAG_CUT_PREALLOCATED
Definition: udf_rel.h:80
MEM_EXTMAP_TAG
#define MEM_EXTMAP_TAG
Definition: udf_rel.h:492
UDF_FE_FLAG_IS_SDIR
#define UDF_FE_FLAG_IS_SDIR
File is a StreamDir.
Definition: udf_rel.h:327
MEM_LNGAD_TAG
#define MEM_LNGAD_TAG
Definition: udf_rel.h:495
EXTENT_FLAG_VERIFY
#define EXTENT_FLAG_VERIFY
Definition: udf_rel.h:81
EXTENT_FLAG_ALLOC_MASK
#define EXTENT_FLAG_ALLOC_MASK
Definition: udf_rel.h:78
MEM_SHAD_TAG
#define MEM_SHAD_TAG
Definition: udf_rel.h:494
EXTENT_FLAG_PREALLOCATED
#define EXTENT_FLAG_PREALLOCATED
Definition: udf_rel.h:79
UDF_MAX_EXTENT_LENGTH
#define UDF_MAX_EXTENT_LENGTH
Definition: udf_rel.h:511
MEM_ALLOC_CACHE_TAG
#define MEM_ALLOC_CACHE_TAG
Definition: udf_rel.h:496
PUDF_ALLOCATION_CACHE_ITEM
struct _UDF_ALLOCATION_CACHE_ITEM * PUDF_ALLOCATION_CACHE_ITEM
LBA_OUT_OF_EXTENT
#define LBA_OUT_OF_EXTENT
Definition: udf_rel.h:426
EXTENT_FLAG_ALLOC_SEQUENTIAL
#define EXTENT_FLAG_ALLOC_SEQUENTIAL
Definition: udf_rel.h:77
PACK_MAPPING_THRESHOLD
#define PACK_MAPPING_THRESHOLD
Definition: udf_rel.h:62
STATUS_ACCESS_DENIED
#define STATUS_ACCESS_DENIED
Definition: udferr_usr.h:145
STATUS_INVALID_PARAMETER
#define STATUS_INVALID_PARAMETER
Definition: udferr_usr.h:135
STATUS_UNSUCCESSFUL
#define STATUS_UNSUCCESSFUL
Definition: udferr_usr.h:132
STATUS_DISK_FULL
#define STATUS_DISK_FULL
Definition: udferr_usr.h:155
STATUS_INSUFFICIENT_RESOURCES
#define STATUS_INSUFFICIENT_RESOURCES
Definition: udferr_usr.h:158
UDFPrint
#define UDFPrint(Args)
Definition: udffs.h:223
WCacheStartDirect__
OSSTATUS WCacheStartDirect__(IN PW_CACHE Cache, IN PVOID Context, IN BOOLEAN Exclusive)
Definition: wcache_lib.cpp:3101
WCacheEODirect__
OSSTATUS WCacheEODirect__(IN PW_CACHE Cache, IN PVOID Context)
Definition: wcache_lib.cpp:3083
Index
_In_ WDFCOLLECTION _In_ ULONG Index
Definition: wdfcollection.h:182
Tag
_Must_inspect_result_ _In_ WDFDEVICE _In_ BOOLEAN _In_opt_ PVOID Tag
Definition: wdfdevice.h:4065
Flags
_Must_inspect_result_ _In_ ULONG Flags
Definition: wsk.h:170